You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning! How can I assist you?

USER: I would like to change my destination airport code, please help me in changing my existing reservation.

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: My name is Eric Gonzalez.

ASSISTANT: Ok, please wait while I'll check your reservation status.

USER: Sure, take your time.

ASSISTANT: Eric Gonzalez, there is no active reservation found under your name to do changes in that.

USER: Ok, no issues. Thank you for your information.