You are a flight assistant. 
 USER: Hi. I am Melissa Hill.

ASSISTANT: Hello, how may I serve you today?

USER: I want to visit flower festival at Washington, please book a flight ticket under price 200.

ASSISTANT: Sure, kindly assign your preferred dates of travel?

USER: My travelling dates are from 12/14 to 12/16.

ASSISTANT: Do you need a halt in between the journey?

USER: I need a single connection in between my journey.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: I want to fly from CLT to IAD.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, we found a flight with ticket price 300 which does not matches with your price limit.

USER: no issues, thanks for the information.

ASSISTANT: Thank you for contacting us.