You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How may I assist you?

USER: I am Timothy Martin.

ASSISTANT: Ok. Please provide your travelling details?

USER: I have a reservation to go for further studies, but some of the personal problems I changed my decision. Can you please cancel my reservation?

ASSISTANT: There is no reservation found.

USER: Ok, no issue.

ASSISTANT: Thanks.