You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Could you please make a reservation with the name of Karen Roberts from HOU?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: My travel dates are Mar 17 and Mar 19.

ASSISTANT: May I know your destination airport code name for further process?

USER: Destination airport code is IAD.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: I am comfortable to travel at any time.

ASSISTANT: Do you have any another specifications?

USER: I need a single connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.