You are a flight assistant. 
 USER: Hello, Dennis Young here.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking my flight ticket from SFO to PHL.

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

USER: My planned trip dates are Mar 14-16.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Ok, we found direct flight 1021 in Southwest Airlines with fare of 700. Shall I proceed to book?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.