You are a flight assistant. 
 USER: Hello, I am John Anderson.

ASSISTANT: Hello, how may I help you at this moment?

USER: Can you aid me in booking a flight ticket from SEA to PHL?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on May 17th and return back on May 19th.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a single connecting flight.

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

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1019. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.