You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Brian Thomas. Due to an emergency I like to cancel my reservation.

ASSISTANT: Sure, may I know your name for the cancellation process?

USER: Already provided, carry on with cancellation.

ASSISTANT:  Sorry, no reservation found on your name to cancel.

USER: No issue, thank you for the help.

ASSISTANT: Welcome, thank you for reaching us.