You are a flight assistant. 
 USER: Hello, I am Nicole Mitchell.

ASSISTANT: Hello, how may I help you today?

USER: I want to attend Innovation festivals at Denver with the direct flight. Can you help me in booking a flight ticket? My fare should be 1000.

ASSISTANT: Sure, is there any price limit? May I know your journey airport codes?

USER: My airport codes are from TX - IAH to CO - DEN.

ASSISTANT: Please mention your dates of travel.

USER: My travelling dates are from 12/06 to 12/08.

ASSISTANT: Ok, please wait for a minute. I will check and revert you.

USER: Sure.

ASSISTANT: Thanks for being wait. There is no direct flight found with your request.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for approaching us and have a good day.