You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Robert Lopez. Due to some problems I am unable to travel in flight so can you please cancel my flight ticket?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Ok, I think my previous reservation has not been booked properly at that time. Thank you for your service.

ASSISTANT: Thank you for choosing us.