You are a flight assistant. 
 USER: Hello, Sandra Martinez here.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Chicago, can you please book me a ticket from LGA to ORD?

ASSISTANT: Sure, may I know your travel dates please?

USER: My preferable journey dates are from 11/21 to 11/23.

ASSISTANT: Wait a moment please.

USER: Please find direct flight on this route.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for choosing us.