You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to attend comic con event held at Las Vegas, please book a ticket from SEA to LAS.

ASSISTANT: Sure, I will help you. Please provide me your trip dates.

USER: My planned trip dates are 05/20 and 05/22.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: May I know your name?

USER: My name is Mark Williams.

ASSISTANT: Mark, there is a flight available with AA airlines and the ticket fare is 200 only. Is that ok for you?

USER: Ok, please book my ticket.

ASSISTANT: Mark, your ticket is booked and your flight number is 1021.

USER: Thank you for your help.

ASSISTANT: You are welcome and thank you for choosing us.