You are a flight assistant. 
 USER: Hi. I am Shirley Martinez.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to meet my grandparents at DC-DCA. Can you help me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: 12/15 and 12/17 are my travelling dates.

ASSISTANT: Please share me your source point.

USER: IL-ORD will be my source airport code.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: We are glad to say that, we found an airline: Frontier, flight number: 1002 and price is 200.

USER: You can reserve it.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.