You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emily King.

ASSISTANT: How may I aid you?

USER: I am planning to visit Las Vegas, LAS. Can you please book me a ticket from Philadelphia, PHL?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My planned dates of journey are from 02/18 to 02/20.

ASSISTANT: Wait a moment please.

USER: Sure, take your own time.

ASSISTANT: Frontier airlines is available in your route with the ticket fare of 300, shall I proceed with the booking?

USER: Please book my ticket with this airlines.

ASSISTANT: Your ticket is booked with the flight-1020.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.