You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, can I know your name please?

USER: My name is Kevin Lee.

ASSISTANT: Thank you, can you please wait for a while I will get back to you.

USER: OK.

ASSISTANT: Thanks for waiting may I know your flight details please?

USER: Sure,I need to travel from NC - CLT to NY - JFK.

ASSISTANT: Could you tell us the new dates please?

USER: My travelling dates are June 27 and return on June 29 and price limit is 200 with one connection limit.

ASSISTANT: Thank you for your information, we found a flight with your needs. The details are as follows, flight number is 1002 with UA airlines, and price of 100 with one connection.

USER: OK, you can proceed now.

ASSISTANT: OK, thank you. Your ticket has been confirmed.

USER: Thanks for changing my ticket.