You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you for your response.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: Sure, my name is William Scott.

ASSISTANT: William Scott, I have found your reservation. Would you like me to cancel it?

USER: Please cancel.

ASSISTANT: Your reservation has successfully cancelled.

USER: Thank you for your service.

ASSISTANT: Thank you for utilizing our service.