Hello.
user
Hello. How may I help you?
assistant
I am Cynthia Campbell, want to travel from DCA to SFO. Please help me in booking my ticket.
user
Sure, on which dates you are willing to travel?
assistant
My travelling dates are from 08/21 to 08/23.
user
On this dates, there is no reservation found.
assistant
It's ok, thank you for your help.
user
Most welcome.
assistant