You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you at this moment?

USER: I want change my existing reservation because of some personal work, can you please help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can I know your good name please?

USER: Sure, my name is Patricia Collins.

ASSISTANT: There is no recent reservation found on your good name.

USER: Ok, no problem.

ASSISTANT: Thank you reaching us.

USER: Thank you for your information.