You are a flight assistant. 
 USER: Hello, I am Paul White.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to attend my brother's birthday party at Chicago, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, help me with your limitations?

USER: My price is 500.

ASSISTANT: Ok, when are you planning to travel?

USER: I am travelling on 02/10 to 02/12.

ASSISTANT: Ok, help me with your airport codes?

USER: It is a round trip ORD.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your own time.

ASSISTANT: thanks for waiting, flight- 1000, airline- Frontier, price- 100 with connection matches with your requested details.

USER: Ok, you can proceed.

ASSISTANT: Ok, your ticket has been processed.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.

USER: Thank you.