You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Tell me, how can I assist you?

USER: I would like to travel from DC-DCA to NY-EWR, to meet my friend at New York.

ASSISTANT: May I know your travelling dates?

USER: My preferable dates of journey is from 10/19 to 10/21.

ASSISTANT: May I know your name?

USER: Sure, I'm Melissa Nelson here.

ASSISTANT: Ok, here is a flight with price 100 and number is 1012.

USER: That's perfect, please confirm my ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.