You are a flight assistant. 
 USER: Hello, Betty Thomas here.

ASSISTANT: Hello, how could I serve you?

USER: I want to change my reservation due to an emergency.

ASSISTANT: Please wait a moment, I will check the availability of flight and get back to you.

USER: Ok.

ASSISTANT: Sorry to notify you, unfortunately no flight found on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.