Hello, Richard Mitchell here.
user
Hello, how can I aid you today?
assistant
I want to fly to WA - SEA on 01/13 from TX - DFW on 01/15 to celebrate my father-in-law birthday.
user
Ok, please give me a moment. Sorry, no flights are available  on your scheduled dates.
assistant
Ok, thank you.
user
Thank you for choosing us, have a great day.
assistant