You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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. Please help me with your name.

USER: Sure, my name is Larry Davis.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

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

ASSISTANT: You are most welcome.