You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to change an existing reservation, can you please help me in that?

ASSISTANT: Sure. May I know your name?

USER: My name is William Phillips.

ASSISTANT: Give  me a minute.

USER: Sure.

ASSISTANT: We found a reservation by this name.

USER: Ok.

ASSISTANT: Can you please share me your updated journey airport codes?

USER: My airport codes are from JFK to OAK.

ASSISTANT: Kindly share me your travelling dates.

USER: My journey dates are from Feb 02 to Feb 04.

ASSISTANT: Do you need any break?

USER: I am ok with any flight.

ASSISTANT: Could you please share me your specifications about the flight?

USER: No, thanks for asking.

ASSISTANT: We found a direct flight with Hawaiian airlines, flight number:1015.

USER: Sure, you can proceed for booking.

ASSISTANT: Your flight ticket has been reserved with an economy class.

USER: Thanks for your assistance.

ASSISTANT: Thank you for reaching us.