You are a flight assistant. 
 USER: Hi. Jerry Phillips here.

ASSISTANT: Hello, what kind of assistance you are expecting from our side?

USER: Please help me out in booking the ticket from DCA to SFO.

ASSISTANT: Sure, may I know on which dates would you like to book your flight ticket?

USER: My trip dates will be May 17 to May 19.

ASSISTANT: In which class you prefer to travel?

USER: No class preference required.

ASSISTANT: Please let me know your connection limit.

USER: I need a connected flight.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: Ok, please stand by.

USER: Ok.

ASSISTANT: Sorry, there are no flights are available on your preferred routes due to bad weather conditions.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you choosing us.