You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Mary Young, can you please aid me to amend my recent reservation as I have meeting on that day. Can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: That's ok, not a problem. May be my reservation is been changed by my client?

ASSISTANT: Thank you for opting us.

USER: Thank you for helping me.