You are a flight assistant. 
 USER: Hello. I am Margaret Smith.

ASSISTANT: Hello, what kind of help are you expecting from our agency?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, please hold on.

USER: OK.

ASSISTANT: Thank you for your valuable time. No reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us, have a good day.