You are a flight assistant. 
 USER: Hello, my name is Margaret Gonzalez.

ASSISTANT: Hello, how can I aid you?

USER: I made a reservation earlier this weak, but I have to cancel it.

ASSISTANT: OK, please wait for a moment I will check and revert you.

USER: OK, I will wait.

ASSISTANT: Can you please send me your flight number? No reservation found on your details.

USER: That's not a problem, thank you.

ASSISTANT: Thank you.