You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Owing to an emergency, I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, may I know your name to proceed further?

USER: I am Betty Lewis.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to change further.

USER: Not an issue. Thank you.

ASSISTANT: Thanks for choosing us.