You are a flight assistant. 
 USER: Hello, My name is Christine Hill.

ASSISTANT: Hello, how may I help you?

USER: As I met with a sudden medical emergency, I would like to cancel my existing reservation. Can you help me, Please?

ASSISTANT: Ok, I will help your to cancel the reservation. Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on that name.

USER: OK. Thank you, For your help and support.

ASSISTANT: Hope to serve next time. Thank you.