You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Mary Allen here.

ASSISTANT: Yes, Allen.

USER: I was made a reservation to Chicago for watching a Football match, earlier in this week.But suddenly the match is cancelled.

ASSISTANT: Oh! That's really very sad.

USER: So I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I help you from this. I found a reservation found on your name Mary Allen. Can I cancel it?

USER: Please cancel it.

ASSISTANT: Your ticket has been cancelled successfully.

USER: Thank you for helping me.

ASSISTANT: Welcome, thank you for reaching us.