You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER: I am William Clark. Owing to an emergency, I want to cancel my reservation.

ASSISTANT: Sure, let me check the status and revert you.

USER: So please help me in the cancellation.

ASSISTANT: We could not find any reservation by the name you mentioned.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.