You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Lee.

ASSISTANT: How can I help you?

USER: I am planning to visit in LAS to meet my friend, can you please find a flight from DEN?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My trip dates are from 12/04 till 12/06.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: Here, I found a flight for you with single connection.

USER: Please proceed.

ASSISTANT: Your ticket is booked with flight number 1020 and airline is Delta.

USER: Thank you for booking.

ASSISTANT: Welcome, have a safe flight.