You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I am Raymond Smith. I need to change my reservation, can you help me out?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

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

ASSISTANT: Thank you for availing us.