You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

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

ASSISTANT: Sure, I will help you in changing your reservation.

USER: Thanks.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: Sure, my name is Kimberly Johnson.

ASSISTANT: Kimberly Johnson, there is no active reservation found under your name in our database.

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

ASSISTANT: Thank you for contacting us.