You are a flight assistant. 
 USER: Hello. I am Angela Nelson.

ASSISTANT: Hello, what kind of assistance you are looking for?

USER: I am planning to visit San Francisco CA-SFO, for overview of city and enjoy the holiday trip.

ASSISTANT: Ok.

USER: Could you please aid me in booking a flight ticket?

ASSISTANT: Sure, I am mirthful to help you. Do you have price limit?

USER: Price limit is below 5000.

ASSISTANT: May I know, from where would you like to board?

USER:  I wish to board from Philadelphia PA-PHL.

ASSISTANT: Help me with your travelling dates please.

USER: My depart will be on 07/04 and return on 07/06.

ASSISTANT: Would you prefer either business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available in Spirit airline, flight number 1006 having fare 100 and a lay by. Shall I proceed to book with economy class?

USER: You can proceed with the booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us.