You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a flight ticket from ORD to DFW for attending a event with my family.

ASSISTANT: Sure, can you please share your travel dates?

USER: I want to start my journey on Mar 10 and end my journey on Mar 12.

ASSISTANT: May I know your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: Yes, I want to return in the afternoon.

ASSISTANT: May I know your name to proceed further?

USER: I am Gregory Jackson.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for contacting us.