You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to book a ticket from IAD to ATL. Could you book a ticket?

ASSISTANT: Sure, may I know your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Can you please share your planned travel dates?

USER: Departure is on Oct, 10 and return date is Oct, 12.

ASSISTANT: Do you have any other requirements?

USER: I would like to depart in the morning time.

ASSISTANT: May I know your name please?

USER: My name is Dennis Roberts.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Thank you.