You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need your help to book a ticket for me.

ASSISTANT: Sure, Could you please mention the travelling details?

USER: I would like to travel from IL- ORD to NY- LGA.

ASSISTANT: OK, can you please mention your dates of travel?

USER: My departure date is 09/30 and return date is 10/2.

ASSISTANT: OK, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight as per your request.

USER: That's really sad. Anyways thank you for the information.

ASSISTANT: Thanks, for consulting us. May I know your name please?

USER: My name is Dennis Martinez.

ASSISTANT: OK. Thank you.