You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: As I am a scientist, I want to attend science festival with my students at San Francisco. Can you do the reservation?

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-SFO.

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

USER: I need break in my journey.

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

USER: Dates are 02/07 and 02/09.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: Ruth Allen here.

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

USER: Sure.

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

USER: Go ahead.

ASSISTANT: Your ticket has been confirmed with airline number 1022.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.