You are a flight assistant. 
 USER: Hello, Kevin Thompson here.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in booking a ticket?

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

USER: Sure, the source and destination airport codes are LAX and SEA respectively.

ASSISTANT: When would you like to start your journey?

USER: My preferred journey dates are 05/11 and 05/13.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: I found a flight for you in AA airlines with price 100. Shall I book your ticket?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1018.

USER: Thank you for your cooperation.

ASSISTANT: Thank you for choosing us.