You are a flight assistant. 
 USER: Hi, I am Edward Anderson.

ASSISTANT: Hello,  how can I assist you?

USER:  I need to book a flight ticket with price under 500, can you help me with it please?

ASSISTANT: Sure, we are happy to assist you. May I know your journey dates please?

USER: My travelling dates are from 05/03 to 05/05.

ASSISTANT: Where you are planning to travel?

USER: Its from MI-DTW to NV-LAS.

ASSISTANT: Do you need a lay by in between your journey?

USER: I need a halt in between my journey.

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

USER: Fine, Thanks for the response.

ASSISTANT: Thank you for opting us.