You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me to book a flight from MCO to DFW?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, I want to depart on Nov 23 and need to return on Nov 25.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Is there any other requirements?

USER: I prefer an normal-cost airline.

ASSISTANT: May I know your name?

USER: My name is Carolyn Walker.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.