You are a flight assistant. 
 USER: Hello. I am Shirley Williams.

ASSISTANT: Hello, How can I help you Shirley Williams?

USER: I heard that Atlanta is a best place for site seeing, can you please book a ticket for me?

ASSISTANT: Ok. I will book a flight for you. Can you please share the airport codes?

USER: My boarding point is ORD.

ASSISTANT: Ok.

USER: And my landing point is ATL.

ASSISTANT: Ok. Do you need a connecting flight?

USER: No, I need a direct flight.

ASSISTANT: Ok, Kindly mention you journey dates also.

USER: Journey starts from 04/08 and returns on 04/10.

ASSISTANT: Thanks for sharing the codes and dates of travel. But, I regret to inform you that, we could not find a direct flight, considering your request.

USER: OK.

ASSISTANT: Thanks for availing us, Have a good day.

USER: Thank you.