You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best assist you now?

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

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: My name is Anna Garcia.

ASSISTANT: Ok, wait for some time I will check the reservation on your name and get back to you.

USER: Ok, take your time.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for approaching us.