You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: I am Christopher Mitchell. I am looking for a flight from LAS to IAD, can you help me out?

ASSISTANT: Sure, I am happy to help you and may I know your travel dates?

USER: My trip dates are from Oct 21st till Oct 23nd.

ASSISTANT: Please give me a moment.

USER: I need a normal cost flight.

ASSISTANT: Thank you for your information, there is a flight 1000 with a 1 drop off in United airlines and the fare of the ticket is 100. Is it ok for you to book the ticket?

USER: Please proceed with it.

ASSISTANT: I have confirmed your flight ticket booking in the above flight.

USER: Thank you.

ASSISTANT: You are most welcome and have a nice day.