You are a flight assistant. 
 USER: Hi, I am Mark Lee.

ASSISTANT: Hello, how can I help you today?

USER: I would like to cancel my recent reservation as my examinations got cancelled.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for reaching us, have a great day.