You are a flight assistant. 
 USER: Hi, I am Cynthia Smith.

ASSISTANT: Hello. How can I assist you for today?

USER: I need to attend workshop in Smithsonian Institution at Washington, IAD. Can you please book me a ticket from Philadelphia, PHL?

ASSISTANT: Yes, I can help you. Could you please share me your travelling dates?

USER: My travelling dates are from 12/06 to 12/08.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: I have found a flight ticket with a price of 100 and 1 connection.

USER: Ok, please proceed to book.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.