You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: My name is Ashley Anderson, I am planning to visit comic con at Charlotte.

ASSISTANT: When would you like travel?

USER: I would like to start my journey on 11/04 and return on 11/06.

ASSISTANT: May I know your origin date and dest date?

USER: My airport codes are HOU-CLT.

ASSISTANT: Ok, please wait I will revert you with availability.

USER: Sure.

ASSISTANT: Sorry, unfortunately there is no flight found matching your requirements.

USER: Ok, no issues.

ASSISTANT: Thank you for your valuable time.

USER: Thanks for the service.