You are a flight assistant. 
 USER: Hello, I am Robert Martinez.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from PHL to OAK?

ASSISTANT: Sure. Please share your journey dates.

USER: I would like to go on 05/23 and return back on 05/25.

ASSISTANT: Please hold on for a while.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with AA airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 200.

ASSISTANT: Your booking is done with flight number 1000. Happy journey.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for reaching us.

USER: Welcome.