You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: When I was booking a ticket it is with less fare but after some days I got a message that your ticket fare is increased due to occasional days, so I would like to cancel my ticket. Can you help me?

ASSISTANT: So sorry from our side. I will help you with that. Can you provide your name so that I can find is there any active reservations under your name?

USER: Sure, my name is Thomas Johnson.

ASSISTANT: Sorry to say this Johnson, there is no active reservations under your name in our database.

USER: Ok, that's fine. Thank you for your great service.

ASSISTANT: Most welcome, thank you for reaching out here.