You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Stephen Mitchell want to attend a workshop at Las Vegas, can you book a ticket with price under 500?

ASSISTANT: Sure, can I know the travel dates please?

USER: Yes, my traveling dates will be 10/30 and 11/01.

ASSISTANT: Could you provide the airport codes please?

USER: Sure, I would like to have my journey from EWR to LAS.

ASSISTANT: Ok, wait a moment please. There is a flight in Frontier airline with price 100, can I book it?

USER: Yes, please.

ASSISTANT: Your ticket has been booked with flight number 1022.

USER: Thank you.

ASSISTANT: Thank you for approaching us.