You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: I will help you with that, please wait a moment I will check.

USER: Ok.

ASSISTANT: Thank you for waiting, I am sorry there are no reservation been found on your name.

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

ASSISTANT: Thank you for connecting with our agency.