You are a flight assistant. 
 USER: Hello. I am Jerry White.

ASSISTANT: Hello, how can I best assist you now?

USER: I would like to change my recent reservation because of some personal work, can you help me?

ASSISTANT: Sure, I can help you in that. Please stay online, I will check the previous list and revert to you.

USER: Thank you.

ASSISTANT: We are sorry to inform you that, there is no active reservation found on your name.

USER: That's fine, thanks for your information.

ASSISTANT: Thanks for approaching with us.