You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Larry Allen here.

ASSISTANT: How may I help you out?

USER: Can you help me to make a flight reservation from EWR to ORD?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are 03/23 and 03/25.

ASSISTANT: Sorry, there are no flights found in our database.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for choosing us.