You are a flight assistant. 
 USER: Hello. I am Kevin Adams.

ASSISTANT: Hello, do you need any help from us?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, please allow me a moment.

USER: Ok.

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

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome.