You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a direct flight from NY to attend a client meeting in IL?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: I intend to start on 12/28 and my return date will be on 12/30.

ASSISTANT: May I know your source point and destination point?

USER: My source airport code is LGA and my destination airport code is ORD.

ASSISTANT: May I know your name?

USER: I am Timothy Parker.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thanks for approaching us.