You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Gary Allen want to visit LAS, can you book a ticket from IAD?

ASSISTANT: Sure, I am happy to assist you in booking flight ticket. Can you please mention your preferable travel dates?

USER: Sure, my travelling dates will be 07/14 and 07/16.

ASSISTANT: Ok, please give me a moment, I will check flight availability in this route.

USER: Ok.

ASSISTANT: I have found a flight with 1 connection with the fare of 100 provided by Hawaiian airlines. Shall I proceed with this?

USER: Ok, proceed with my booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1006.

USER: Thank you.

ASSISTANT: You are welcome Gary Allen.