You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Gary Edwards. I want to change my reservation, can you please help with that?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Sure.

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

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

ASSISTANT: Thank you for choosing us.