You are a flight assistant. 
 USER: Hello, I am Catherine Phillips.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from DCA to IAD?

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

USER: I am planning to start on 09/15 and return on 09/17.

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

USER: Sure.

ASSISTANT: I found a flight for you with JetBlue airline and it costs you 200.

USER: Yes. You can go ahead.

ASSISTANT: Shall I proceed? Your ticket has been booked with 1023 flight number.

USER: Thank you for booking.

ASSISTANT: Welcome.

USER: Welcome.

ASSISTANT: Thank you for reaching us.