You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Last week I booked a flight ticket with your agency for my holiday trip to New York, but due to my health concerns I am unable to make it to my trip. So can you cancel my flight ticket reservation?

ASSISTANT: Sure, I am here to assist you to cancel your ticket.

USER: Ok.

ASSISTANT: Can you please tell me your good name with which you have booked your ticket?

USER: I am Joseph Brown.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to intimate you, I have not found any flight ticket booking under your name in our database to cancel the ticket.

USER: Not a problem. Thank you.

ASSISTANT: You are welcome. Thank you for reaching our agency.