You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you right now?

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

ASSISTANT: Sure, I will help you with your request.

USER: Thank you for your response.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Sure, my name is Joshua Thompson.

ASSISTANT: Please wait a moment to check.

USER: Ok.

ASSISTANT: We regret to notify to that, there is no reservation available on your name in our records.

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

ASSISTANT: Thank you for approaching us, hope you have a great day.