@Wipada0 this is a community forum of hosts and guests not monitored by Airbnb.
If your guests wants to change their booking they just need to go to their booking confirmation and hit the amend button and change it to the dates they want.
Hello @Wipada0, to add to Helen's message, please note that this is a public forum, therefore, please watch out with sharing any personal information including that of your guests. We want this platform to be a safe place for everyone.