You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kevin Green.

ASSISTANT: How can I aid you for the day?

USER: I need to change my name in my recent reservation, can you help me in modifying the reservation please?

ASSISTANT: Sure, please a moment I will check  and revert back to you.

USER: Sure.

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

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.