You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Scott Johnson. I want to book a ticket from DCA to LAS, can you help me?

ASSISTANT: Please let me know your travelling dates?

USER: My travel dates are 08/21 and 08/23.

ASSISTANT: Here is a flight ticket with fare 100 and AA as airline.

USER: You can book it.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.