You are a flight assistant. 
 USER: Hello.

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

USER: I am Robert Thompson. I want to cancel my flight ticket, due to some problems I am unable to travel so please help me with that?

ASSISTANT: Sure, I will help you with that. Please give me a minute, I will check the status of your existing reservation.

USER: Ok, thank you for accepting my request.

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

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

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