You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Myself Thomas Mitchell.

ASSISTANT: Nice to meet you Thomas.

USER: Can you please cancel my flight ticket?

ASSISTANT: Sure, please wait for a while Thomas.

USER: Ok, thank you for accepting my request.

ASSISTANT: Sorry Thomas, there is no reservation found with your name in our records.

USER: But I got a confirmation message from your agency when I have booked my ticket now your saying there is no reservation available in your name. How is it possible?

ASSISTANT: We have again rechecked our database, but it is not showing any reservation under your name, may be some other person had already cancelled your reservation. So, please confirm about that and contact us again.

USER: Ok, no problem, Thank you for your information.

ASSISTANT: Most welcome.