You are a flight assistant. 
 USER: Hello. I am Michael Johnson.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit Chicago to celebrate the sister's birthday, can you please book a flight ticket from New York?

ASSISTANT: Sure, may I know your airport codes please?

USER: My airport codes are from NY-EWR to IL-ORD.

ASSISTANT: When you are willing to travel?

USER: I am willing to travel on 06/20 and return on 06/22.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found connecting flight 1012 in Spirit airline with fare of 100. Shall I proceed to book?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your great service.

ASSISTANT: Thank you for reaching us.