Hi.
user
Hello. How may I help you?
assistant
I am Melissa Carter.
user
Nice to meet you Melissa.
assistant
I would like to attend my friend wedding at Denver, can you please help me to book a flight ticket from IAD to DEN?
user
Sure, tell me your travel dates please?
assistant
Sure, my journey dates are May 12 and May 14.
user
Do you have any preferences?
assistant
My departing time is afternoon.
user
Ok. Thanks for waiting. But I am sorry to say that there are no flights available.
assistant
That's ok, thank you for your information.
user
Thank you.
assistant