You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you at this moment?

USER: I have planned for the trip and booked a ticket but suddenly the trip got cancelled, so I need to cancel my past ticket. Can you please help me to do that?

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

USER: I am happy for your response.

ASSISTANT: May I know your good name?

USER: My name is Mary Carter.

ASSISTANT: Please wait for a minute.

USER: Ok, I will wait for your reply. Take your own time.

ASSISTANT: We are regret to inform you that, there is no active reservation on your name in our database.

USER: It's ok, not an issue with that. Thank you for your time.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: You are welcome.