You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Paul lee here. I would like to change my recent reservation, can you help me?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

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

ASSISTANT: Thank you for reaching us.