You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: As my exam got cancelled, I want to cancel my reservation. Can you help me out?

ASSISTANT: May I know your name?

USER: Sure, my name is Karen Johnson.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.