You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Will you please help me to book a flight ticket from IAD to LAS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sept, 15 and Sept, 17 are my travel dates.

ASSISTANT: Do you have any other specifications?

USER: I need connecting flight.

ASSISTANT: Please help me with your name for booking.

USER: Christopher Lopez here.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1008. Shall I proceed with this flight?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.