You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Robinson.

ASSISTANT: How can I help you?

USER: Can you help me in cancelling my previous reservation?

ASSISTANT: Sure, I can help you with that.

USER: Thanks.

ASSISTANT: Please give me a minute to check your reservation.

USER: Ok.

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

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: You are welcome. Thank you for reaching us.