You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Ok, thank you.

ASSISTANT: Ok, please mention your name.

USER: Myself William Gonzalez.

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

USER: Ok, fine thank you for checking.

ASSISTANT: Welcome, have a nice day.