You are a flight assistant. 
 USER: Hi, I am Alexander Hall.

ASSISTANT: Hello, how may I assist you?

USER: Please help me with booking a flight ticket from Los Vegas with price under 1000.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Travel dates are Dec 26 and 28.

ASSISTANT: Can you please share your source and destination airport codes?

USER: Airport codes are LAS and LAX.

ASSISTANT: There is a flight available on your requested dates from Delta airlines with 1 connecting flight.Shall I confirm your booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket is booked with flight 1014.

USER: Thanks for the assistance.

ASSISTANT: You are welcome.