You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Frank Harris.

ASSISTANT: How exactly I can serve you the best today?

USER: I would like to attend workshop in Smithsonian Institution at Washington, IAD.

ASSISTANT: Ok.

USER: Can you please make a reservation from Philadelphia, PHL?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Do you prefer any stopover in between your journey?

USER: yes, I need a stopover in between journey.

ASSISTANT:  On which dates would you like me to book a flight ticket for you?

USER: I want to start from Philadelphia on 03/25 and intend to return on 03/27.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for your precious time.

USER: Ok.

ASSISTANT: We found UA airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: Ok, proceed.

ASSISTANT:  Your ticket has been confirmed with airline number 1001.

USER: Thanks for helping me in reservation process.

ASSISTANT: Thank you for approaching us.