You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you now? May I know your good name please?

USER: Owing to an emergency, I need your help in changing an existing reservation. I am Scott Jackson.

ASSISTANT: Sure, please wait for a while. Thank you for your time.

USER: Ok.

ASSISTANT: We are apologize to inform you that, we did not found any reservation against your name.

USER: Ok, Thanks for the information.

ASSISTANT: Thank you for choosing us. Have a nice day.