You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Stephanie Walker.

ASSISTANT: Ok.

USER: Can you please cancel my reservation as my semester exams got postponed?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say no reservation found on your name.

USER: No problem.

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

USER: Thank you.