You are a flight assistant. 
 USER: Hello, I am Steven Parker.

ASSISTANT: Hello,. How can I support you today?

USER: I am invited for the inauguration of sports festival at Charlotte, NC-CLT.

ASSISTANT: Ok.

USER: Could you please help me with booking a flight ticket?

ASSISTANT: Sure, we are here to help you. I need your origin code for booking further.

USER: Sure, Houston, TX-HOU is my source airport code.

ASSISTANT: Kindly, mention your dates of travel.

USER: 07/14 is my departure date and 07/16 is my arrival date.

ASSISTANT: Thanks for sharing your details. There is no flight found on your dates of travel. Thank you for availing with us.

USER: Not a big problem, thank you for the information.