You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I would like to visit Orlando, can you please help me to book my flight ticket from IAD to MCO?

ASSISTANT: May I know on which dates you are willing to travel?

USER: Thank you. I will depart on Aug 19th and return back on Aug 21st.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I prefer for a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: Please check for a normal-cost airline.

ASSISTANT: Can I have your name please?

USER: Rebecca Williams.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: Not an issue. Anyway, thank you.

ASSISTANT: Thank you.