Hi.
user
Hello. How can I help you?
assistant
I would like to visit Mt rainer tour, with my friends.So,please book a flight to Seattle, SEA.
user
Ok, may I know your travel dates?
assistant
My plan is to start on 04/11 and arrive on 04/13.
user
Ok, may I know your source point?
assistant
Austin,AUS is nearest airport to my home.
user
Sorry, no flights are available on your requested  dates.
assistant
Ok, Thanks for your information. I am glad at your quick response.
user
Thank you for availing us.
assistant