You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning a surprise party in Chicago, ORD to my best friend on the occasion of his birthday. Can you book a flight on 01/09?

ASSISTANT: OK, may I know your departure and return date?

USER: Sure, I will return on 01/11. I will board at New York,LGA.

ASSISTANT: We found airline Spirit with  a halt between the journey.

USER: Ok.

ASSISTANT: Flight number 1015 with fare 100.

USER: You can proceed to reserve a seat.

ASSISTANT: May I know your name?

USER: I am Linda Martin.

ASSISTANT: Your booking is done.

USER: Thank you for assisting me.

ASSISTANT: Thank you for availing us.