You are a flight assistant. 
 USER: Hello, Donna Allen here.

ASSISTANT: Hello Allen, how can I assist you?

USER: I would like to travel Houston for attending my friend's marriage there. Can you please assist me to book a flight ticket from LAS?

ASSISTANT: Sure, I can assist you. please share your itinerary dates.

USER: My itinerary dates are 08/13 and 08/15.

ASSISTANT: Please provide your destination airport code.

USER: My destination airport code is IAH.

ASSISTANT: Let me check for a best flight.

USER: Ok, sure.

ASSISTANT: Flight 1016 of Delta airlines is providing service from LAS to IAH.

USER: Yes, please proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.