You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, can you let me know what kind of service are you looking for?

USER: Will you deal with the cancellation services?

ASSISTANT: Yes, we do provide cancellation services also.

USER: I have booked a ticket for Music event, but the event has been cancelled. So, I would like to cancel my recent reservation.

ASSISTANT: Ok, I will help you with that. Before going to cancel that, please let me know your name to check whether your reservation is existing or not.

USER: Previously, I have done my reservation with the name of Justin Green.

ASSISTANT: Green, please hold on for a while, I will get back to you.

USER: Sure, take your own time.

ASSISTANT: There is no reservation found under the name of Justin Green in our database.

USER: Ok, not an issue. I guess my friend has already cancelled the reservation on behalf of me, I will confirm with him once.

ASSISTANT: That's fine, do you need any other help from us?

USER: No, thanks with this information.

ASSISTANT: Thank you for consulting us. Please reach us at any time for the future bookings and cancellation services too.

USER: Thank you for your service.