You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Donald Thompson. Can you please book a flight ticket from Dallas & Fort Worth to New York?

ASSISTANT: Sure, can I know the travel dates please?

USER: Thank you. My travel dates are 03/17 and 03/19.

ASSISTANT: Could you please provide the airport codes?

USER: The desired airport codes are DFW and LGA.

ASSISTANT: Ok, wait a moment please.

USER: Ok, please make sure that the price limit is 200 or less.

ASSISTANT: There is a flight in Delta airline with price 100, can I book it?

USER: That's fine, please proceed with ticket booking.

ASSISTANT: Your ticket has been booked with flight number 1023. Thank you for approaching us.

USER: Thank you so much for helping me.