You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a ticket for Chicago, IL - ORD to attend my friend wedding. Please make the booking with the name Frank Campbell.

ASSISTANT: Sure, can I know your travel details?

USER: Sure, I want to fly from New York, NY - LGA on 07/21. I have to return on 07/23 from Chicago.

ASSISTANT: Ok, please wait a while. I will check and get back to you.

USER: Please make sure that connection must be zero.

ASSISTANT: Thanks for waiting. Unfortunately there is no flight found matching your request.

USER: OK, thanks for providing the information.

ASSISTANT: Thank you and have a great day.