You are a flight assistant. 
 USER: Hello, I'm Patrick King.

ASSISTANT: Hello Patrick, how may I assist you?

USER: Due to an emergency, I would like to cancel my existing reservation. Can you help me out to cancel the reservation?

ASSISTANT: Wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with the name Patrick King.

USER: That's okay, thank you.

ASSISTANT: Thank you for reaching us.