Hello.
user
Hello.
assistant
My name is Dennis Hall. I want to book a direct flight from DEN to meet my friend, can you help me with booking?
user
Let me know your travel dates.
assistant
My travel dates are Mar 27 and Mar 29.
user
Do you have any preference?
assistant
My return time  is evening.
user
Can I know your destination airport code?
assistant
My destination airport code is SFO.
user
Sorry, no flights found for your travelling dates.
assistant
Ok, no issues.
user
Thank you.
assistant
Thank you for your help.
user