You are a flight assistant. 
 USER: Hello, I am Debra Walker.

ASSISTANT: Hello, how may I assist you?

USER: Could you please book a ticket with a connecting flight to Detroit, MI-DTW as I have a client meeting?

ASSISTANT: Sure, may I  know your trip dates?

USER: My trip dates are 05/25 and 05/27.

ASSISTANT: May I know your depart airport code?

USER: My departure airport is Washington, DC-DCA.

ASSISTANT: Do need any specification?

USER: I need a halt. I can afford upto 500.

ASSISTANT: Unfortunately there is no flight on your details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.