You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Stephen Edwards here.

ASSISTANT: Glad to meet you Edwards.

USER: I want to visit Philadelphia for a business trip, so could you please help me with booking of a flight ticket?

ASSISTANT: Sure, I'm here to help you. May I know your airport codes please?

USER: Thank you, I want to travel from DCA to PHL.

ASSISTANT: Ok, may I know your travel dates please?

USER: My boarding is on 06/03 and please book a return flight ticket also on 06/05.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Sure, I will wait for your response.

ASSISTANT: I found a flight for you with UA airline and it costs you 100. Shall I proceed?

USER: If it is single connected, you can proceed with booking.

ASSISTANT: Your ticket has been booked with 1022 flight number.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.