You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Katherine Jones, I want to book a flight from CA-LAX to MI-DTW to meet my friend on his birthday. Can you book a flight for me?

ASSISTANT: Sure, I will help you. Let me know your journey dates.

USER: I like to travel on 03/02 and return on 03/04.

ASSISTANT: Ok, may I know your price limit?

USER: My price limit is 500 for flight ticket.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, we could not found any flights on your journey dates.

USER: Thank you for the details, I will replan my journey.

ASSISTANT: Okay, we hope to serve you after re-planning your scheduled. Thanks for approaching us.