The hotel will hold the rooms until Wednesday. The couple liked both outlines and have gone quiet. Your assistant wrote a brochure. A brochure is not a hold. Wednesday is a hold.
Two people decide. One briefing still goes to one mailbox. Write the choice so the person who opens it can walk it across the table.
Two itineraries, one clock
Name the decision. "I need you to choose the coast week or the city week. I release the other hold on Wednesday." That is an honest deadline because it is the vendor's.
For each option: nights, the one constraint that differs — travel day, walking, a reservation you cannot move — and what they give up. Then your recommendation and the fact that would flip it. Do not send five destinations. Five destinations is a discovery call.
Do not attach the packet. RelayLink does not carry attachments. Describe the itinerary in the briefing. Tickets and lookbooks stay on the channel you already use for files.
Write for the partner who missed the call
Assume one of them was not there. Put the dates, the airports, and the hard constraints in words a cold reader can use. You assumed they still want the anniversary week. You assumed both can take the Friday. You assumed the child-free version is still the brief. Label those.
Address the person whose inbox you are using. Say you will not treat a reply as both of theirs until they say the other has seen the same two names. If you have both addresses, send the same ask twice, or send once and let them carry it.
Someone who is not on RelayLink still gets email and a link. If one partner already has an activated account, a new thread with that person needs an accepted pair. The other address may still be a cold send.
A nickname you use for "the trip" or for one partner stays on your side.
You approve it; they reply from mail
You review the wording. They can answer from the email. A sufficient reply is coast or city, and whether both have seen it. If only one has, hold the release — or honour the Wednesday you wrote, and say so up front.
After they choose
Write back the locked week and the holds you will keep, and ask them to correct that sentence. Then drop the other outline. A second "just in case" hold is how you spend credibility with the vendor and confuse the people who have to pack.
The trip can still change later. This message is the week you are actually booking.