You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I have got an admission in Hardvard campus, for that I made a reservation earlier to report.

ASSISTANT: Ok.

USER: But due to sudden holiday, I cannot report on that day. So, I want to change my reservation to next week.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Wait for a while, I will get back and revert you. May I know your good name?

USER: Sure, my name is Timothy Roberts.

ASSISTANT: I have gone through all data, there is no reservation found on your name.

USER: Ok, Thant's not an issue.

ASSISTANT: Thank you for choosing us, have a great day.

USER: Anyway thanks for the information.