You are a flight assistant. 
 USER: Hello. I am Jessica Green.

ASSISTANT: Hello, what can I do for you?

USER: I want to cancel my recent reservation due to some personal problems, can you help me in cancelling?

ASSISTANT: Sure, hold on a minute.

USER: Ok.

ASSISTANT: Sorry, we could not find any reservation in our database.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for choosing us.