You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Donald Walker. I am Planning to book a ticket from DCA to ORD to attend seminar, can you help me in booking?

ASSISTANT: Yes, I can help you. Could you please share me your travelling dates?

USER: I am departing on 03/27 and return on 03/29.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found a flight ticket with a price of 300 and 1 connecting flight.

USER: Please proceed for booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.