You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from IL - ORD to NY - EWR. Can you help me to book a flight ticket?

ASSISTANT: May I know the travelling dates?

USER: My travelling dates are 02/23 and 02/25.

ASSISTANT: Please wait for a while. May I know your name for booking the flight ticket?

USER: My name is Kimberly Lee.

ASSISTANT: Kimberly, there are no flights on your requirement.

USER: It's ok, really sad. Anyways thank you for the information.

ASSISTANT: You are welcome.