You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Betty Collins. Can you please book me a ticket from ORD to meet my old friends?

ASSISTANT: Sure, I will help you out in booking the ticket.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: I would like leave between 12/17 and 12/19.

ASSISTANT: Can I know your departure code please?

USER: My airport codes are from ORD to LAX.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: Ok, please book this ticket.

ASSISTANT: Ok, your ticket has been booked with flight number 1004.

USER: Thank you.

ASSISTANT: Thank you for choosing us.