You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, can I know your travel dates?

USER: I am planning my journey on the dates of Feb 28 and Mar 01.

ASSISTANT: Ok, please let me know your specifications?

USER: I prefer business class for this trip.

ASSISTANT: May I know your name?

USER: My name is Pamela Lewis.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Pamela Lewis, thank you for choosing us.