You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I need to book a fight ticket from MCO to DEN, can you help me in booking a flight ticket?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my travelling dates are Aug 6 and Aug 8.

ASSISTANT: Do you have any connection limit?

USER: I prefer maximum one connection.

ASSISTANT: Is there any other requirements?

USER: I would prefer depart time at evening.

ASSISTANT: May I know your name?

USER: Sure, Ronald Johnson here.

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

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

ASSISTANT: Thank you for availing us.