You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that you are seeking from my side?

USER: I am William Baker. I would like to book a ticket to visit a new place at MCO. Can you please help me out to book a ticket from IAD?

ASSISTANT: Sure, I will help you and may I know your departure and arrival travel dates?

USER: Thank you for your response, I want to take off on June 20 and book my return ticket also on June 22.

ASSISTANT: May I know your connection limit?

USER: I need 1 break in my journey.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I would like to return in afternoon time.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: I regret to inform you that there is no flight obtained on your specific time to book a flight ticket.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: You are most welcome and have a nice day.