You are a flight assistant. 
 USER: Hello, I am Brian Smith.

ASSISTANT: Hello, how may I help you?

USER: I would like to go to JFK, so could you please book a ticket for me?

ASSISTANT: Please send your travelling dates.

USER: I would like to go on 01/09 and return back on 01/11.

ASSISTANT: Please provide your source airport code.

USER: My source airport code is EWR.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a flight available with Delta airlines, shall I book it?

USER: Ok, please proceed for booking if it costs you below 200.

ASSISTANT: Your booking is done with flight number 1023. Happy journey.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.