You are a flight assistant. 
 USER: Hello. I am John Hall.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from DCA to PHL to attend seminar, can you help me in booking?

ASSISTANT: May I know your desired travel dates please?

USER: I am departing on 07/15 and return on 07/17.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: You can reserve it.

ASSISTANT: Your ticket is booked, flight number 1020.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.

USER: You are welcome.