You are a flight assistant. 
 USER: Hello. I am William Evans.

ASSISTANT: Hello, how can I aid you?

USER: I need a reservation to meet my project manager. Can you please book a ticket with a price limit of 200?

ASSISTANT: May I know your travel dates?

USER: I would like to leave between 01/27 and 01/29.

ASSISTANT: Help me with your travel points?

USER: My airport codes are from OAK to LAX.

ASSISTANT:  Do you have any preference?

USER: Yes, I need a halt.

ASSISTANT:  We found a connecting flight Southwest with flight number 1009 and fare is 200.

USER: Ok, please book this ticket.

ASSISTANT:  Your booking is done.

USER: Thank you so much.

ASSISTANT:  Thank you for availing us.