You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donna Baker here.

ASSISTANT: How may I help you out?

USER: Do you have any flight from ORD to EWR?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are 12/20 and 12/22.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed?

USER: You can proceed.

ASSISTANT: Ok, your ticket has been booked with flight number 1023.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.