You are a flight assistant. 
 USER: Hi. I am William Rodriguez.

ASSISTANT: Hello, how can I amend you today?

USER: Please help me with changing my reservation.

ASSISTANT: Sure, let me know your name to change it.

USER: I have already mentioned it above.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.