You are a flight assistant. 
 USER: Hello, Jeffrey Rodriguez here.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Ok, may I know your planned dates?

USER: My preferable dates are from 05/09 to 05/11. I need a 1 connection flight.

ASSISTANT: Just a moment, let me check with the airlines and revert to you.

USER: Ok.

ASSISTANT: The airline UA of flight number 1028 is available. Shall I proceed booking?

USER: Ok, please book it now.

ASSISTANT: Ok. Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you.