You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have a live music concert at Houston, please help me in booking a ticket from DFW to HOU.

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

USER: My trip dates are on Nov 25 and Nov 27.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I prefer a connecting flight.

ASSISTANT: Do you have any class preference?

USER: Any class is comfortable for me.

ASSISTANT: Do you have any airline preference?

USER: No, thank you for asking.

ASSISTANT: Do you have any specific time preference?

USER: I would like to return in the afternoon.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. Could you help me with your name please?

USER: My name is George Evans.

ASSISTANT: Sorry, there is no flight available on this route for the given dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching our agency.