You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: I am Mark Hernandez.

ASSISTANT: Ok.

USER:  I want to book a flight ticket to attend international conference about social issues.

ASSISTANT: Sure, I would be happy to help you. Can you please provide your take off and landing airport codes?

USER: My airport codes are IAD and JFK.

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

USER: Yes.

ASSISTANT:  May I know when you have planned to travel?

USER: My travelling dates are 04/29 and 05/01.

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

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found Frontier airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been confirmed with airline number 1019.

USER: Thank you for aiding me.

ASSISTANT: Thank you for choosing us.