You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Matthew White. I have reserved a ticket to meet my friend but suddenly he arrived to my home now. So I would like to cancel my reservation, can you please help me with that?

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: No, I remember the month in which I have reserved my ticket so check once again.

ASSISTANT: Sorry to say you, there is no reservation.

USER: Oh! I will check my mail once again and if I have any queries, I will reach you again. Anyway, thank you for your time.

ASSISTANT: Thank you for opting us.

USER: Most welcome.