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

ASSISTANT: Hello, How can I provide assistance to you?

USER: As I am planning my weekend to Washington to visit my grandmother's house, I need your help in ticket booking.

ASSISTANT: Sure, I am mirthful to help you. Please provide your travelling dates?

USER: Travelling dates are 12/04 to 12/06. Please book a direct flight from CLT to DCA.

ASSISTANT: Do you have any price limit?

USER: Price should not exceed 5000.

ASSISTANT: Ok, please wait a while, I will check the availability and let you know.

USER: Ok.

ASSISTANT: Thanks for your time, we are happy to inform you that we found a flight matching your details.

USER: Is it a direct flight?

ASSISTANT: No, It is connected flight.

USER: I need a direct flight only. Please don't go with booking.

ASSISTANT: Ok.

USER: Thanks for the valuable information.

ASSISTANT: Thank you for approaching us, Have a great day.