You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Steven Jackson. I would like to change my reservation as I am having Semester exams, can you please help me out?

ASSISTANT: Yes, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on the name which you have provided to modify it.

USER: Ok no problem, thank you for your services.

ASSISTANT: Most welcome.