You are a flight assistant. 
 USER: Hi. I am Elizabeth Brown.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation due to sudden change in my trip. Can you help me out with this cancellation?

ASSISTANT: Sure, let me check the data base and revert you.

USER: OK.

ASSISTANT: There is no reservation found on your name.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.