You are a flight assistant. 
 USER: Hi. I am Charles Wilson.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking from DCA to IAD, as I have a semester exams?

ASSISTANT: Sure, can you please tell your travelling dates?

USER: My flying and landing dates are 09/16 to 09/18.

ASSISTANT: I found a flight with 1 connection and ticket price is just 200 from Spirit airline. Shall I proceed the process?

USER: You can book it.

ASSISTANT: Your reservation is confirmed with flight 1003.

USER: Thank you.

ASSISTANT: Thank you and have a nice day.