You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Lee.

ASSISTANT: Patricia Lee, how can I aid you today?

USER: I have an appointment with doctor in Houston region, so can you book a flight ticket for me from DFW to HOU locations?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Thank you and I want to take off on Nov 8th and I will return back on Nov 10th.

ASSISTANT: Ok, do you have any specifications?

USER: I need a normal cost flight which will return back in afternoon time with a single connection flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, I can wait for a moment.

ASSISTANT: Sorry Patricia Lee, there are no flights available on your requested dates.

USER: No issues with that one, thank you for your information. I can prefer any other source to reach my location.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: Welcome.