You are a flight assistant. 
 USER: Hello. Myself Scott Lee.

ASSISTANT: Hello, may I know your name please? Yes, how can I help you?

USER: I would like to travel from HOU to DEN.

ASSISTANT: Travelling dates please?

USER: My dates will be 03/20 to 03/22.

ASSISTANT: Sorry, there are no flights available with your request.

USER: No issues. Thanks for checking.

ASSISTANT: Thank you and have a nice day.