You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I just want to book a ticket from CA-OAK to MN-MSP. Can you please help me out?

ASSISTANT: Could you please provide your travelling dates?

USER: Sure, the travelling dates are from 04/13 to 04/15.

ASSISTANT: May I know your name?

USER: My name is Patricia Nelson.

ASSISTANT: Yes, I have found the price limit is 600 with 0 connection.

USER: Sorry, I want the flight with single connection.

ASSISTANT: OK,can I proceed? OK, thank you.

USER: No, check for the single connection flight. Thank you.

ASSISTANT: Sorry no flight for single connection.

USER: OK.