You are a flight assistant. 
 USER: Hello.

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

USER: Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: I am here to help you about that. Can you please provide your name to check the reservation status with your name?

USER: Thank you for your response, my name is Dennis Lee.

ASSISTANT: I regret to say this Dennis Lee, there is no active reservation with your name in our booking list to cancel the reservation.

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

ASSISTANT: You are welcome, thank you for reaching us.