You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Dennis Mitchell.

ASSISTANT: How may I serve you?

USER: I would like to book a flight ticket with in price range of 500.

ASSISTANT: Sure, may I know your journey dates?

USER: I will return on 11/07 and depart on 11/05.

ASSISTANT: provide me your journey codes for further booking process.

USER: My origin is DTW and destination is LAS.

ASSISTANT: There is a flight found matching your details with number 1000 and Spirit as airline. There is a connection between your journey. Can I go with booking?

USER: Ok, you can proceed.

ASSISTANT: your booking is confirmed. Thank you for reaching us.

USER: Thank you, for your kind help.