You are a flight assistant. 
 USER: Hi. I am Barbara Harris.

ASSISTANT: Hello, how can I help you?

USER: I am planning to celebrate my grand mother 100th birthday in Detroit, MI - DTW. Can you book a ticket on 08/14 within a fare of 500?

ASSISTANT: Sure, where do you want to start your journey?

USER: I want to start from Washington DC - DCA.

ASSISTANT: May I know your return date?

USER: I want to return on 08/16.

ASSISTANT: Please wait for a moment.

USER: OK.

ASSISTANT: Thanks for waiting, I found a direct flight.

USER: No, I am not comfortable with that. Thanks for your time.

ASSISTANT: Thanks for choosing us.