You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Which help do you need from our agency?

USER: Can you please help me in booking my flight from DEN to reach MCO?

ASSISTANT: Sure, I will help you to do flight ticket reservation. Could you please tell me your planned journey dates?

USER: Thank you, my travelling dates are Dec 29th and Dec 31st.

ASSISTANT: Ok, I need your name to proceed further. Can you please provide that?

USER: My name is Sarah Williams.

ASSISTANT: Ok, please tell me your preferences if any.

USER: I prefer a direct flight for my journey.

ASSISTANT: I regret to tell you that, there are no flights found in this route on the dates you have given.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: You are welcome. Thank you for opting us.