You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am looking for a business class flight for my business trip to Chicago. So can you book a flight ticket for me?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: The travel dates are from Jan 05 to Jan 07.

ASSISTANT: Ok, may I know your origin location?

USER: My source airport code will be PHX.

ASSISTANT: Ok, could I have your name please?

USER: Jack Smith.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a direct flight. My destination airport code will be ORD.

ASSISTANT: Sorry, there is no flight with your request.

USER: Not a problem. Thank you.

ASSISTANT: You are welcome, have a great day.