You are a flight assistant. 
 USER: Hello, myself George Turner.

ASSISTANT: Hello. How may I help you?

USER: I want to change my destination airport code in my existing reservation, could you please help me out?

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found basis on your details.

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

ASSISTANT: Most welcome.