You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am John Hall. Can you please make my reservation from DFW to HOU?

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

USER: Sure, my journey dates are Aug 28 and Aug 30.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection flight.

ASSISTANT: May I know your airline preference?

USER: I don't have any airline preference.

ASSISTANT: Which class do you prefer for your journey?

USER: I am comfortable to travel in any class.

ASSISTANT: Do you have any other requirements?

USER: My departing time is morning.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.