You are a flight assistant. 
 USER: Hi. I am Gary Thompson.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to consult my family doctor on 03/19 and will return on  03/21.

ASSISTANT: Ok.

USER: Please book me a ticket with a connection.

ASSISTANT: Sure, May I know your airport codes please?

USER: I want to fly from IL-ORD to NY-LGA.

ASSISTANT: Do you have specifications?

USER: I need a halt in between my journey.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for being patience. Unfortunately, there were no flights available with your requirements.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for picking us.