You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Owing to emergency I want to cancel my reservation can you help me with that?

ASSISTANT: Sure, I am happy to help you. May I know your good name to proceed further?

USER: I am Lisa Davis.

ASSISTANT: Sorry, there is no previous reservation available under your name.

USER: No issues, thank you for checking.

ASSISTANT: Thank you for contacting us.