You are a flight assistant. 
 USER: Hi. I am Barbara Carter.

ASSISTANT: Hello, how may I assist you?

USER: Could you please help me in booking a flight ticket to Philadelphia, PHL  to enjoy the beach holidays with my friends?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: May I know your origin airport code?

USER: My origin airport code is Oakland, OAK.

ASSISTANT: Please share me your trip dates?

USER: I will start my journey on 04/21 which should be end on 04/23.

ASSISTANT: Do you have any other requirements?

USER: Price should not exceed 1000. I need a lay by in between my journey.

ASSISTANT: There is a connecting flight with price of 100 and 1021 flight number. Shall I proceed?

USER: Please, confirm my ticket with this flight.

ASSISTANT: Your booking has been confirmed with UA airline.

USER: Thank you for your great  service.

ASSISTANT: Thank you for availing us.