You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What assistance do you need from us?

USER: Suddenly I got a call from my project manager to attend the meeting on the same departure date in my hometown itself. So, I am looking to cancel my reservation. Can you please help me with that?

ASSISTANT: Sure, I can assist you with the cancellation process, once I have found your reservation.

USER: Thank you for accepting my request instantly.

ASSISTANT: Ok, can you please tell me the name on which you have reserved your previous ticket?

USER: Sure, I have reserved the ticket under my name of Christopher Green. So, you can check with this name.

ASSISTANT: Ok Christopher Green. I will put the conversation on hold for a while, is it ok for you?

USER: I am ok with that, take your time to check my reservation.

ASSISTANT: I am really sorry to inform you that, when I have checked your ticket status in the confirmation chart list, I haven't found your name in that list. So, I am unable to cancel your ticket.

USER: Oh! It might be cancelled already. I have forgotten that due to some busy schedule.

ASSISTANT: Ok, that's not a problem. Anyways thanks a lot for consulting our travel agency.

USER: My pleasure. Thank you for spending your valuable time to check my reservation.

ASSISTANT: You are most welcome. Have a nice day.