@Jessica3692
Jessica, do not under any circumstance cancel this booking yourself.
We hosts hate unscrupulous hosts who will cancel confirmed bookings to chase the better price they should have declared in their listing when you booked.
Firstly Jessica keep all communication with this host in the Airbnb message stream! As much as he will try to influence you privately only respond through the message stream so there is a record of it!
Hosts who do this need to be punished! This host possibly knows he can get away with a penalty free cancellation under certain circumstances and may try to use that if you refuse to cancel. Whatever, the reservation now becomes uncomfortable for both you and the host.
If the host insists that you cancel, get onto Airbnb and tell them the host is pressuring you to cancel so he can rebook his property at a higher price.
Tell them as much as you wanted to stay, flights are booked and you are committed to travel but, this host has put you in an uncomfortable position where the stay, if it proceeds, is going to be very stressful and ask if they can relocate you to another property at the hosts expense because the host is breaking Airbnb's rules.
They won't do that of course Jessica but, they may put the reservation cancellation obligation back on the host, put it through as a host cancellation and give you a 10% relocation bonus.
Good luck with this Jess, we feel sorry for you, this should not happen and Airbnb do try the utmost to look after guests. If you need any further help let us know. We can't affect Airbnb programming but as a group we can offer advice.
Cheers........Rob