You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Christine Carter here.

ASSISTANT: How may I assist you?

USER: Due to emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Ok, please be on hold.

USER: Ok, I will wait.

ASSISTANT: Sorry, there is no reservation found to cancel.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us.