You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Rebecca Miller. I would like to travel from HOU to HOU, could you help me out?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable dates are from 03/06 to 03/08. Please check for direct flights.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Thank you, have a good day.

ASSISTANT: Thank you for opting us.