You are a flight assistant. 
 USER: Hello, Alexander Moore here.

ASSISTANT: Hello, how may I help you?

USER: I would like to meet my partner at Chicago, please book a ticket from LAS to ORD.

ASSISTANT: Sure, may I know your preferred journey dates please?

USER: My journey dates are 02/18 and 02/20.

ASSISTANT: Moore, please wait for a minute.

USER: Sure, take your time.

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

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1022.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.