You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to fly from ORD tyo ATL. Can you book a ticket from that route?

ASSISTANT: Can I know your travelling dates?

USER: My planned travel dates are 06/02 and 06/04.

ASSISTANT: Do you have any preferences?

USER: I want a flight with single connection with in the business class only.

ASSISTANT: Please let me know your name?

USER: Sure, Karen Lewis here.

ASSISTANT: Sorry currently there are no flights for your travelling dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you.