You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket to MCO from IAD in December month. Can you please help me with that?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: Thanks for your concern. My travel dates are Dec 12 and Dec 14.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I need single stop over in between my journey.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need a return flight for my journey in the evening.

ASSISTANT: Can I have your good name please?

USER: Sure, my name is Cynthia Mitchell.

ASSISTANT: There are no flights with your given details on those dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us.