You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Jerry Brown, want to travel from SFO to DCA. Please help me in booking my ticket.

ASSISTANT: Sure, please provide your trip dates.

USER: Sure, my trip dates are from 10/12 to 10/14.

ASSISTANT: Do you have any other requirements?

USER: Make sure, my departing time should be in the morning with no connection.

ASSISTANT: Sorry Jerry, there is no direct flights available on these route.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.