You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

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

ASSISTANT: Sure, we are glad to assist you. Could you please help me by providing your name to check the reservation status?

USER: Thank you. Sure, my name is Lisa Wright.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Ok, take your time.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

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

ASSISTANT: Thank you for approaching us.