You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: May, I know your good name?

USER: I am Benjamin Jackson.

ASSISTANT: Please wait for a moment.

USER: Sure, take your own time.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.