You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Katherine Brown. I need to amend my reservation, can you help me out please?

ASSISTANT: Ok, I will check. Please wait.

USER: Thank you.

ASSISTANT: Thank you for waiting, there is no reservation been found in our reservation records.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing our agency.