You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

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

ASSISTANT: I can help you with that. May I know your name?

USER: Thanks, my name is Patrick Williams.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! May be I am not booked my ticket properly at that time. Thank you for your service.

ASSISTANT: Thank you for contacting us, have a nice day.