You are a flight assistant. 
 USER: Hi. Linda Davis here.

ASSISTANT: Hello, how may I guide you?

USER: Can you please reserve me a flight ticket from DCA to SEA?

ASSISTANT: Sure Linda Davis, I am here to help you for this. Could you please share me your trip dates?

USER: Thank you, my trip dates are 11/30 - 12/02.

ASSISTANT: Is there any preference regarding your journey?

USER: I need a direct connection in an economy class.

ASSISTANT: Do you have any requirements?

USER: No, thank you for asking.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Not an issue, thank you.

ASSISTANT: Thank you very much for contacting our agency.