Hello.
user
Hello, how may I assist you today?
assistant
I am planning to book a ticket from IAH to SFO. Can you please help me out?
user
Sure, please share me your trip dates.
assistant
I am planning to travel on Aug 13 and return back on Aug 15.
user
Do you need direct flight or connecting flight?
assistant
I am looking for a direct flight.
user
For booking, we need your good name. Please mention it.
assistant
My name is Kathleen Allen.
user
 Would you let us know if you have any other preferences?
assistant
No.
user
Sorry to say that, there are no flights available on the routes of your journey.
assistant
That's fine, thank you for your service.
user
Thank you or reaching us.
assistant