You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Shirley Nelson and I want to book a direct flight to attend a house warming ceremony at NC-CLT.

ASSISTANT: Ok, kindly mention your travel dates?

USER: 09/28 and 09/30 are my travelling dates.

ASSISTANT: May I know your origin airport code?

USER: I would like to start from CO-DEN.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: No issue.

ASSISTANT: Thanks for reaching us, have a good day.

USER: Thank you for your help.