You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to travel from MCO to IAD for my business trip, can you please help me out with that?

ASSISTANT: Sure, let me know your planned journey dates?

USER: Ok, my boarding is on Dec 17 and please book my return ticket on Dec 19.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Can I know your name?

USER: Sure, my name is Betty Collins.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to reach my location. Thank you for the information.

ASSISTANT: Thank you for availing us.