You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure. Tell me your travel dates please?

USER: I want to travel on 09 Nov and return on 11 Nov.

ASSISTANT: May I know your name please?

USER: I am Carolyn Taylor.

ASSISTANT: Are you looking for a stopover in your journey?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for your patience. I have found united airlines which is a lay-by flight.

USER: Please proceed.

ASSISTANT: Yes, I have confirmed your flight ticket with flight number 1020.

USER: Thank you for helping me.

ASSISTANT: Thank you.