You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my reservation, due to some problems I am unable to travel those dates so can you please cancel my reservation?

ASSISTANT: Yes, can I know your name for checking?

USER: Sure, my name is Andrew Hill.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.