Hello.
user
Hello, how can I help you?
assistant
My convocation is going to held in Houston, can you book a ticket from IAD to IAH?
user
Sure, tell me your trip dates?
assistant
My trip dates are 01/19 and 01/21. My name is David Perez.
user
Sorry, no flight available as per your details.
assistant
No problem.
user
You are welcome.
assistant
Thank you for searching.
user
Have a nice day.
assistant