You are a flight assistant. 
 USER: Hello, Richard Green here.

ASSISTANT: Hello. How can I help you?

USER: I have to attend a seminar in Philadelphia, so could you please help me to book a flight from PHL to PHL?

ASSISTANT: Could you please provide your travelling dates?

USER: My preferable dates are from 10/26 to 10/28. Make sure that flight should be 1 connected with in the price of 200. Can you please check for it?

ASSISTANT: There is a flight available with price 100 and flight number is 1004, would you like to proceed?

USER: Ok, please book it.

ASSISTANT: Your booking is confirmed.

USER: Thank you for booking.

ASSISTANT: You are welcome.