You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in cancelling my recent reservation, as my exam got cancelled.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Myself, Mark Wilson.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Ok. no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.