You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Betty King here. I am a politician, I have to meet Donald Trump. Could you book a ticket from SFO to DCA?

ASSISTANT: Sure, let me know your travel dates please?

USER: My itinerary dates are Feb 11 and Feb 13.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preference?

USER: I want to depart in the afternoon.

ASSISTANT:  Betty King, sorry to inform you that there are no flight services available on your given dates.

USER: No problem, thank you.

ASSISTANT: Thanks for contacting us.