You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicole Green.

ASSISTANT: How may I assist you?

USER: I want to book a flight ticket on 10/18 and return on 10/20, so can you help me with booking please?

ASSISTANT: Sure, I will help you. May I know your source and destination airport codes please?

USER: Thank you, my airport codes are Atlanta, GA-ATL and Seattle, WA-SEA.

ASSISTANT: Please wait a moment.

USER:  Ok.

ASSISTANT: Thank you for your waiting, I found a flight for you in Southwest airlines with fare 100. Can I book your ticket?

USER:  Yes, please.

ASSISTANT: Ok, your booking is confirmed with flight number 1000.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.