You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to book a ticket from DFW to DCA. Can you please help me out?

ASSISTANT: May I know your name?

USER: My name is Nicole Jackson.

ASSISTANT: When you are planning to go?

USER: I am planning to travel on Feb 17 and return back on Feb 19.

ASSISTANT: May I know your connections?

USER: I am looking for a connecting flight.

ASSISTANT: Do you prefer any specifications?

USER: My depart time should be afternoon.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you.