Hi.
user
Hello, thanks for connecting with us. How can I help you?
assistant
My name is Charles Mitchell.
user
I hope your doing good Charles?
assistant
 I want to attend my friend's marriage at San Fransisco , could you please help me with booking a flight ticket?
user
Sure, please tell your exact journey details?
assistant
Source airport code is DCA and destination airport code is SFO.
user
Ok, your travelling dates please?
assistant
The travel dates are from 01/31 to 02/02.
user
Sorry, there are no flights with your requested dates.
assistant
That's fine.
user
Ok.
assistant
Thank you for your help.
user
Thank you and have a nice day.
assistant