You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Joshua Allen here.

ASSISTANT: How can I assist you?

USER: Can you book a flight ticket for my airport codes that is from LAS to BOS?

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

USER: The travel dates are from 20 Feb to 22 Feb.

ASSISTANT: Do you have any requirements?

USER: The return time would be evening.

ASSISTANT: Ok, wait a moment please.

USER: I need a direct flight.

ASSISTANT: There is a direct flight in United airlines, can I book it?

USER: Yes, you can book the flight ticket.

ASSISTANT: Your ticket has been booked with flight number 1019.

USER: Thank you.

ASSISTANT: Thank you for approaching us.