You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Smith.

ASSISTANT: How may I help you?

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

ASSISTANT: Kevin Smith, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation was found.

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

ASSISTANT: Thank you for choosing us.