You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want your help to making some changes in my existing reservation due to the busy schedule on my previous planned dates.

ASSISTANT: Sure, may I know your name please?

USER: My name is Susan Scott.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.