You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you right now?

USER: Paul Clark here. I want to meet my friend on his birthday, can you please help me to book my flight ticket from ORD to LGA?

ASSISTANT: Sure, when would you like to travel?

USER: I will depart on 09/29 and return on 10/01.

ASSISTANT: There is a flight with 0 connection, is it ok for you?

USER: No, I prefer for a single connection flight.

ASSISTANT: Sorry, there is no flight with 1 connection.

USER: Sad to hear that, anyway thank you for checking.

ASSISTANT: You are welcome.