You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I render you today?

USER: I am Nicole Garcia.

ASSISTANT: Ok.

USER: I am planning to conduct a sports festival at Washington. Can you help me in searching a flight ticket with fare of 500?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My source airport code is Oakland, CA - OAK. My destination is Washington, DC - DCA.

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

USER: Yes, I need a flight with a layover.

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

USER: I will start my journey on 05/10 and again I will be back on 05/12.

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

USER: Sure.

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

USER: Proceed with my booking.

ASSISTANT: Your ticket has been confirmed with airline number 1000.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.