You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin Clark and I want to change and existing reservation.

ASSISTANT: We found a reservation please give your journey details.

USER: Ok, I would like to travel from NC-CLT to NY-LGA. My travelling dates are from 10/31 to 11/02.

ASSISTANT: Yes, there is a direct flight in Hawaiian airline with the flight number of 1016. The cost of the ticket is 100. Shall I proceed?

USER: Ok, You can proceed with this airline.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thanks for opting us.