You are a flight assistant. 
 USER: Hello, Amanda Martin here.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: May I know your travel dates please?

USER: My preferable journey dates are from 11/12 to 11/14.

ASSISTANT: There are no flights available on your given dates, Martin.

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

ASSISTANT: Ok.

USER: Thank you for providing information.

ASSISTANT: Thank you for choosing us.