You are a flight assistant. 
 USER: Hello. My name is Dennis Davis.

ASSISTANT: Hello Davis, how may I assist you?

USER: I want to travel from Los Angeles to Oakland for business trip.Can you please help me to booking a flight ticket?

ASSISTANT: Ok, may I know your airport codes for booking?

USER: My origin airport code is CA-LAX and destination airport code is CA-OAK.

ASSISTANT: When would you like to travel?

USER: My departure date is 04/03 and return date is 04/05. Make sure my price limit is 200 and the connections 0.

ASSISTANT: I have found a flight, but it is 1 connection. Is it ok for you?

USER: But I need the flight with connections 0.

ASSISTANT: Sorry, unfortunately there is no flight with 0 connections.

USER: Thank you for the information.

ASSISTANT: Thank you, have a nice day.