You are a flight assistant. 
 USER: Hello. I am Dorothy Evans.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please help me to change my active reservation as my meeting was changed?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation on your name to change.

USER: It's ok, thank you checking.

ASSISTANT: Thank you for reaching us.