You are a flight assistant. 
 USER: Hello, I am Gary Anderson.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend as a chief guest for Culture, heritage and folk festivals in Chicago. Can you help me to book a connecting flight?

ASSISTANT: Sure, could you please share your origin and destination airport codes?

USER: My airport codes are ATL and ORD.

ASSISTANT: Please share your travelling dates.

USER: I want to fly on Sept 19 and return on Sept 21.

ASSISTANT: Is there any class preference?

USER: No, I don't have any class preference.

ASSISTANT: We found a flight with single connection and price is 100 of 1004 flight. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with Frontier airlines.

USER: Thank you.

ASSISTANT: Thank you for choosing us.