You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want reserve my ticket from HOU to LAS, can you please help me in booking?

ASSISTANT: May I know your travel dates?

USER: Sure, my planned dates of journey are from Sep, 10 to Sep, 12.

ASSISTANT: Do you prefer connecting flight?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want to depart at afternoon time and return at evening time.

ASSISTANT: May I know your good name?

USER: Sure, my name is Justin Miller.

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

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.