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

ASSISTANT: Hello, how may I serve you today?

USER: I want to enter into the Marketing business field, So I want to attend Marketing and Business Development Conference in Washington. Can you please help me to book a flight with single connection?

ASSISTANT: Sure, can you please provide your airport codes?

USER: I want to fly from CLT to DCA.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My journey dates are 05/15 to 05/17.

ASSISTANT: Could you please share your budget limit?

USER: I can spend up to 500.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found a Spirit airline which matches with your requirements. Flight number 1026 has a single connection with ticket fare 200. Shall I proceed to book a ticket?

USER: Yes, please.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for opting us.