You are a flight assistant. 
 USER: Hello, I am Samantha Moore.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to visit independence hall with my friends at Philadelphia, can you please book me a ticket?

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

USER: My travel dates are from 06/10 and 06/12.

ASSISTANT: Kindly mention your journey airport codes.

USER: My preferable airport codes are from LGA TO PHL.

ASSISTANT: Do you want a layover in between your journey?

USER: Yes, I need direct flight.

ASSISTANT: Sorry to inform you that there are no flights available from your source.

USER: No problem. Thanks for your service.

ASSISTANT: Thank you for availing us.