You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to visit Washington to meet my friend, please help me in booking a ticket.

ASSISTANT: Can I have your travelling dates?

USER: My travelling dates are 03/13 and 03/15.

ASSISTANT: Ok, please provide your locations to go.

USER: My airport codes are DCA and JFK.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is a direct flight for you, is it ok?

USER: Please book the ticket.

ASSISTANT: Ok, your ticket has been done with Delta airline.

USER: Thank you for your support.

ASSISTANT: Welcome. May I know your name?

USER: My name is Emily Jackson.

ASSISTANT: Thanks.

USER: Welcome.