You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to book a flight ticket from IAH to HOU. Could you help me in booking?

ASSISTANT: Sure, can you share me your trip dates?

USER: My travelling dates are from Feb 09 - 11.

ASSISTANT: Do you have any specifications?

USER: I prefer for direct flight.

ASSISTANT: Can I know your good name?

USER: Joshua Walker.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.