You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Gonzalez here.

ASSISTANT: How can I aid you now?

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

ASSISTANT: Sure, let me know your travel dates.

USER: My travelling dates are 07/01 and 07/03.

ASSISTANT: May I know your airport codes please?

USER: My airport codes are ATL and ORD.

ASSISTANT: Do you have any specifications?

USER: I would prefer normal cost airline with single halt.

ASSISTANT: Let me know about your connection limit. May I know about your class preference?

USER: It's not an issue.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us, have a great day.