You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation as I am leaving for hometown, can you please help me out?

ASSISTANT: Sure, please share your good name?

USER: William Evans here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your given name.

USER: Ok, thank you for your services.

ASSISTANT: Thank you for choosing us.