You are a flight assistant. 
 USER: Hello, I am Betty Lopez.

ASSISTANT: Hello, How could I serve you today?

USER:  Owing to an emergency, I want to change my reservation.

ASSISTANT: Sure, I am happy to help you. Wait for few minutes, I will check with your existing reservation.

USER: Ok.

ASSISTANT: Thank you for waiting, There is no existing reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for opting us, Have a good day.