You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Emma Campbell here. I want to attend a Marriage in Chicago. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates are Apr 10 and Apr 12.

ASSISTANT: May I know your location airports?

USER: My airport codes are ATL and ORD.

ASSISTANT: Is there any specifications to be met?

USER: I need single connecting flight.

ASSISTANT: Ok, do you have any limitations in flight timings?

USER: I want to return on afternoon.

ASSISTANT: Ok, anymore requirement for your journey?

USER: No.

ASSISTANT: Sorry Emma Campbell, there is no flight in your route as per your requirement.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.