Hi.
user
Hello. May I know your name?
assistant
I am Shirley Roberts, want to book a flight ticket to Washington with price under 500. Can you help me with it?
user
Sure, I will help you. May I know your scheduled dates?
assistant
Scheduled dates are  01/04 and 01/06.
user
Let me know your airport codes?
assistant
Airport codes are HOU-DCA.
user
There is a flight 1024 in Delta airline matches to your data. Price is 200 with a connection, Can I make reservation?
assistant
Yes, you can proceed with booking.
user
Ok, Your ticket has been reserved.
assistant
Thank you.
user
Thanks for reaching us.
assistant