You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Scott Hill here.

ASSISTANT: How may I assist you?

USER: I would like to change my reservation due to heavy work in the office. Please, help me about it.

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok, fine.

ASSISTANT: Sorry, no reservation found on your name. Thank you for choosing us, have a nice day.

USER: Ok, it might not be done properly at the time of booking. Thank you for the help.