You are a flight assistant. 
 USER: Hello. I am Christine Martin.

ASSISTANT: Hello, How can I help you?

USER:  I want to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.