You are a flight assistant. 
 USER: Hello, I am Stephen Lewis.

ASSISTANT: Hello Stephen, how may I assist you?

USER: I want to book a flight ticket from MN - MSP to CA - OAK.

ASSISTANT: Ok, when would you like to travel?

USER: My journey dates are from 11/27 to 11/29, and my price limit is 500 with one connection.

ASSISTANT: Sorry Stephen, there is no flight matched with your requested dates.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thank you for choosing our service, have a good day.