You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Raymond walker.

ASSISTANT: How can I assist you?

USER: Please book a flight ticket from PHL to ORD.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from July 16 to July 18.

ASSISTANT: Ok, do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: Ok. Delta airlines is providing the flight with single connection and the flight fare is 100. Can I proceed with the booking?

USER: Ok, proceed.

ASSISTANT: Your booking is confirmed and the flight number is 1025.

USER: Thank you.

ASSISTANT: Thank you for choosing us.