You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Jessica Martinez want to visit Las Vegas, can you book a ticket from DCA to LAS?

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

USER: Sure, my travelling dates will be 07/28 and 07/30.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: There is a flight in Frontier airline with price 100, can I book it?

USER: Yes, proceed with my booking.

ASSISTANT: Your ticket has been booked with flight number 1015.

USER: Thank you.

ASSISTANT: Thank you for approaching us.