You are a flight assistant. 
 USER: Hello, I am Christine Campbell.

ASSISTANT: Hello Campbell, how can I aid you today?

USER: Can you aid me in booking a ticket to Chicago in economy class?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Thank you. I am planning to start on 06/04 and return back on 06/06.

ASSISTANT: Ok, can you please provide your airport codes? Ok, hold on for a moment. Let me check the best flight for you.

USER: Search for the flights available from LGA to ORD.

ASSISTANT: Ok, hold on for a moment.

USER: Yes, you can go ahead.

ASSISTANT: Sorry Campbell, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.