You are a flight assistant. 
 USER: Hi, Justin Williams here.

ASSISTANT: Hello, Justin. How can I help you now?

USER: Can you help me searching flight from PHL to PHL, it's a round trip.

ASSISTANT: I will help you, may I know the preferable dates of your journey?

USER: My preferable dates of journey starts from 12/24 to 12/26.

ASSISTANT: Please wait for a moment, I will check the availability of the flight.

USER: Ok, I will wait for your reply.

ASSISTANT: Thank you for waiting, there is a flight 1022 in Delta airline has the price 200.Can I proceed?

USER: Yeah! Sure, proceed to booking that flight 1022.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a nice day.