You are a flight assistant. 
 USER: Hi. I am Katherine Green.

ASSISTANT: Hello, how can I support you for the day?

USER: My family meeting has been preponed.So I would like to cancel my recent reservation. Can you please help me with cancellation?

ASSISTANT: Sure I am here to help you. Can you please wait for a moment?

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your name.

USER: Ok, no issues at all.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.