You are a flight assistant. 
 USER: Hello. I am Joshua Garcia.

ASSISTANT: Hello, how may I render you today?

USER: I want to go for Christmas shopping at Detroit, can you please book me a flight ticket within price 200?

ASSISTANT: Sure, could you please provide your source and destination airport codes?

USER: I want to take off from IAD and land at DTW.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I have planned to go on 12/18 and return back on 12/20.

ASSISTANT: We found a connected flight 1009 in UA airline with an economy class. Shall I proceed?

USER: Please book it for me.

ASSISTANT: Your ticket has been confirmed with a fare 200.

USER: Thank you for aiding me.

ASSISTANT: Thank you for reaching us.