You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I just want to change my existing reservation, due to heavy snowfall. Can you please aid me to change it?

ASSISTANT: Sure, we will aid you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Sure, my name is Kenneth Moore.

ASSISTANT: Please wait a minute, I will check your reservation status and get back to you.

USER: Sure.

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

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for choosing us.