You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Ryan Walker. I want to book a flight ticket from CA - LAX to MI - DTW. Could you help me in booking?

ASSISTANT: Sure, I will help you. When you are planning to start your journey?

USER: Thank you. My preferable dates are from 05/06 to 05/08.

ASSISTANT: Do you have any restrictions on price?

USER: My price limit is 500.

ASSISTANT: Thank you for sharing the details, wait a minute.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights available that matches your requirements.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.