You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

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

ASSISTANT: Sure, can I know your name please?

USER: Elizabeth White here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation found with your given name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you.