What solutions exist for converting "thinking" customers?

Question

Marketing

Good afternoon! One of the projects needs to increase the conversion. A lot has been done for this and almost everything works. Due to the fact that there was a stupor "what else can we improve so that the client is satisfied?" - we decided to conduct a survey with the clients themselves.
It turned out that most of the clients do not mind using the services offered, but due to their specifics (tourism) - "they will order later" (not to be confused with those who have not yet decided on a trip, there is a separate wording for such).
The question is: What tools can be used to convey to the client that it is better to complete the application now / remind about yourself after a certain period of time?
PS Offers to include remarketing/retargeting/offers with pluses "order now"/email mailing can be omitted, that's understandable.

Answer 1

here item 7, replace only the form:
Heading: "Remind about the rest":
Hourglass (figure) and 3 buttons in the subsection "Remind in:" "week", "2 weeks", "in a month" and under them a subsection with title: "I will specify the date:" and a field (or 3 separate fields: day, month, year) for entering the date and the button "Create and enable a reminder!".

Answer 2

about "we will order later" you are a little mistaken, although the tool does not change from this

Answer 3

We are arranged in such a way that we never forget those who owe us something.
Become a "must" to your customers in the best sense of the word: a bonus account, a free transfer to the airport on the Yandex.Taxi Premium tariff, a free visit to the airport lounge area on the Priority Pass. You won't forget it.)