You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Robert Williams. I am planning to visit Las Vegas to meet my friend, can you please book me a ticket from IAD to LAS?

ASSISTANT: Sure, can you please let me know your travelling dates?

USER: My planned dates of journey are from 01/30 to 02/01.

ASSISTANT: UA airline is providing flight for you with price 100, shall I proceed?

USER: Please book my ticket with this airlines.

ASSISTANT: Your ticket has been booked with flight-1006.

USER: Thank you for booking my ticket.

ASSISTANT: My pleasure.