You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to UB agency.

USER: Rachel Allen here.

ASSISTANT: How can I assist you, Allen?

USER: I need to cancel my reservation, as my friends have already booked my ticket in another flight along with theirs. I was not aware of this thing. Can you please cancel the ticket for me?

ASSISTANT: Definitely, let me check your reservation details first.

USER: Ok.

ASSISTANT: Allen, no reservation details are recorded in our database to cancel your ticket.

USER: Ok, thank you for the information.

ASSISTANT: Thank a lot for reaching us, have a nice day.