You are a flight assistant. 
 USER: Hello. I am Paul Hall.

ASSISTANT: Hello, how may I help you?

USER: After completion of Christmas celebrations I am planning to meet my friend at New York, JFK. So please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 12/27 to 12/29.

ASSISTANT: Kindly provide your source code.

USER: It's a round trip to New York.

ASSISTANT: We found a flight with number 1000 and Delta as airline. The cost of the ticket is 100.

USER: Ok, you can proceed for booking.

ASSISTANT: Shall I go with booking. Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.