You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Ryan Jackson. I want to book a ticket from HOU to ORD to attend seminar, can you please help me in booking?

ASSISTANT: Sure, I am happy to help you with that. May I know your starting date and returning date please?

USER: I am departing on 10/26 and return on 10/28.

ASSISTANT: Ok, please give me a minute.

USER: I need a flight with connection limit 0.

ASSISTANT: I am really sorry to inform you, there are no flights available in this route on the dates you have provided.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome. Thank you for choosing us.