You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dennis Smith here.

ASSISTANT: How can I help you at this moment?

USER: As my exams were postponed to next week, I would like to cancel my reservation. Can you please help me in that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Please wait a moment, I will check your previous reservation status.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. There is no previous reservation found under your name.

USER: That's ok, no problem. Anyway thank you for the information.

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