You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Parker.

ASSISTANT: How may I assist you?

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

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us, have a nice day.