You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking my flight from PHL to reach DCA, as I have to conduct a science fare there?

ASSISTANT: Yes, I can help you. Can you tell me your travelling dates?

USER: Thank you. My planned travel dates are Dec 28th and Dec 30th.

ASSISTANT: Do you have any other specifications?

USER: I must need a single connecting flight.

ASSISTANT: Do you have any preferences?

USER: I usually prefer economy class only.

ASSISTANT: Give me a moment.

USER: Ok, sure.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: Ok, please confirm it.

ASSISTANT: Can I know your name for booking?

USER: Sure, my name is Timothy Parker.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the service.

ASSISTANT: Thank you for reaching us.