You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ruth Green here.

ASSISTANT: Green, how may I assist you?

USER: Yesterday I booked a ticket to New York through your agency, your agent by mistakenly booked a ticket on wrong dates, so I want to cancel my reservation.

ASSISTANT: Please hold on, let me check our database.

USER: Ok, please.

ASSISTANT: Sorry, no reservation found by your name. May be your ticket is not confirmed.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.