You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to book a flight ticket from IAD to PHL?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travelling dates are Nov 17 to Nov 19.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found an economy class ticket with a price of 100 and it is a direct flight.

USER: Please proceed to book under the name of Scott king.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.