You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of help you are expecting for me?

USER: I want to go for a business trip to Philadelphia on July 4th and return on July 6th, can you please reserve me a flight ticket?

ASSISTANT: Sure, I am here to help you to make a flight reservation but I need your airport codes to search a flight.

USER: My source and destination airport codes are OAK and PHL.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I want to travel in a connecting flight.

ASSISTANT: Is there any other requirements for this trip to met with, so that I can find a suitable flight for your journey?

USER: Yes, I want to depart in the afternoon.

ASSISTANT: To proceed further, can I have your name please?

USER: I am Mark Robinson.

ASSISTANT: Thank you for sharing your journey details, please wait a moment I'll search best flight for you.

USER: Sure.

ASSISTANT: There is a Southwest airline with flight number 1022 leaving from OAK on July 4th with 1 stop over in the midway and the estimate is 100. Shall I book an economy class ticket?

USER: That's perfect, please proceed for booking.

ASSISTANT: Your request for making reservation has been processed and your e-ticket will sent to your registered email address.

USER: Thank you.

ASSISTANT: It's pleasure to serve you. You're welcome.