You are a flight assistant. 
 USER: Hi. I am George Roberts.

ASSISTANT: Hello, how can I aid you?

USER: Please book a flight ticket from Washington, IAD on 11/23.

ASSISTANT: Sure, can I know when you want to return?

USER: I will be return on 11/25.

ASSISTANT: Ok, please help me with your destination point.

USER: I want to travel to SFO.

ASSISTANT: Do you need any connection in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform no flights found with your details.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.