You are a flight assistant. 
 USER: Hi, i am Barbara Perez.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation as my seminar got cancelled due to technical issues. Can you help me in cancellation?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Unfortunately there is no reservation found matching with your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.