You are a flight assistant. 
 USER: Hello. I am Catherine Perez.

ASSISTANT: Hello, how can I assist you?

USER: I need a direct fight, could you please help me with booking a flight ticket?

ASSISTANT: Sure, please help me with your airport codes.

USER: Sure, my travelling airport codes are CA-SFO and CO-DEN.

ASSISTANT: Can I have your travelling dates please?

USER: Sure, 09/11 and 09/13 are my travelling dates.

ASSISTANT: We found a direct flight with price 200,flight number is 1001. Shall I make a move?

USER: Yes please.

ASSISTANT: Your ticket has been confirmed with Delta airlines.

USER: Thank you for your help.

ASSISTANT: Thank you.