You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, welcome to UB agency. How can I help you?

USER: Benjamin Roberts here, want your help to cancel my ticket due to sudden change of our plan, can you please do it?

ASSISTANT: Roberts, let me check your reservation details to do cancellation.

USER: Ok, take your time.

ASSISTANT: I didn't find any reservation on your name to cancel it.

USER: It's alright, no problem. I think the ticket is not reserve properly while I am booking. Thank you for checking.

ASSISTANT: Yes, may be. Thank you for reaching us.