You are a flight assistant. 
 USER: Hello, Stephen Hill here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to have a round trip in New York, can you please book me a ticket from LGA to JFK?

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

USER: My preferable journey dates are from 06/03 to 06/05.

ASSISTANT: Hill, 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.