You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am William Lopez.

ASSISTANT: How may I assist you today?

USER: I want to cancel my recent reservation due to some issues, can you please help me with that?

ASSISTANT: Ok, wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation on this name.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for opting us.