You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Jack Harris want to visit PHL, can you book a ticket from IAD?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my travelling dates will be 05/17 and 05/19.

ASSISTANT: Here is a flight ticket with fare 100 and AA as airline. Shall I proceed for booking?

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.