You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a ticket from HOU to DFW.

ASSISTANT: Sure, may I know the travelling dates?

USER: My travelling dates are from Oct, 27 to Oct, 29.

ASSISTANT: Please help me with your connection limit.

USER: I would be comfortable with single stop over.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in the evening time.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: May I know your name?

USER: Dennis Miller.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: Thank you.

ASSISTANT: Thank you for opting us.