You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Donald Harris here. I want to attend a Agricultural Seminar in Chicago for a round trip. Can you please help me for booking a ticket from ORD?

ASSISTANT: Sure, I will help you out in booking the ticket. May I know your travelling dates please?

USER: My departure date is 09/07 and return date is 09/09.

ASSISTANT: Ok, please wait a moment.

USER: Ok, make sure my connections limit is 0.

ASSISTANT: Ok, I will check it. Sorry, there are no flights available on these dates.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing our services.