You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to travel from SFO to DCA, help me in booking a flight?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Nov 10 to 12.

ASSISTANT: Do you have any specifications?

USER: I want to departure in evening flight.

ASSISTANT: May I know the connection limit?

USER: I am ok with any flight.

ASSISTANT: Please provide me the name to reserve the ticket.

USER: I am Eric Johnson.

ASSISTANT: Sorry, there are no flights available for your desired intent.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.