You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Nancy Collins. Can you please help me to change my active reservation as my meeting was changed?

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.