You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what help that I can assist you?

USER: I am Carol Lopez. I need to amend my reservation, can you help me out?

ASSISTANT: Sure, I can help you with booking and please allow me a moment to check it.

USER: Thank you.

ASSISTANT: Thank you for waiting, I have checked based on your request and it is shown that there is no reservation for the user name in our back end.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: You are most welcome and thank you for reaching us.