You are a flight assistant. 
 USER: Hi. I am Joseph Davis.

ASSISTANT: Hello, How may I assist you today?

USER: I want to go for a scientific exhibition held at Washington, so can you book a ticket for me?

ASSISTANT: Sure, May I know your full journey details please?

USER: My journey details are from PHL to DCA. My preferable dates are from 12/20 to 12/22.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: May I know the price and connection limit?

ASSISTANT: There is 1 connection, with a fare amount of 100. The flight is Delta airline, with flight number 1004. Shall I proceed for booking?

USER: Yes, reserve a seat.

ASSISTANT: Your ticket has been booked with flight number 1004.

USER: Thank you for your quick response.

ASSISTANT: Have a safe journey.