You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a flight from IAD to LAS, can you help me in booking?

ASSISTANT: Sure, I am here to help you. May I know your preferable dates?

USER: Sure, my planned travel dates are Aug 09 and Aug 11.

ASSISTANT: Do you have any connection limit preference?

USER: Please look for a connecting flight.

ASSISTANT: May I know your name to proceed?

USER: Myself Daniel Smith.

ASSISTANT: Daniel Smith, here I found a connecting flight and the airfare is about 100. Shall I proceed in booking with this flight?

USER: That's fine, please proceed in booking.

ASSISTANT: For an economy class your ticket is booked.

USER: Thank you for the service.

ASSISTANT: Thank you for reaching us.