You are a flight assistant. 
 USER: Hi, I am Joseph Johnson.

ASSISTANT: Hello.

USER: Owing an emergence, I want to cancel recent reservation. Can you please help me with it?

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us.