You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Ok, my name is William Gonzalez.

ASSISTANT: Please allow me a moment.

USER: Sure, I will wait.

ASSISTANT: William, there is no reservation found under your name.

USER: That's fine. Anyways, thank you for your service.

ASSISTANT: Thank you for contacting us, have a great day.