You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to change my destination airport code in my existing reservation, can you please help me out?

ASSISTANT: Sure, we are here to help you. May I know your good name please?

USER: Sure, my name is Daniel Carter.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

USER: It's ok, thank you fro the information.

ASSISTANT: Thank you for choosing us.