You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I need to surprise my parents with my first salary where my parents are leaving at Washington. Can you please book me a flight ticket from Charlotte?

ASSISTANT: Please let me know your travelling dates.

USER: I need to travel on 01/30 and return on 02/01.

ASSISTANT: Ok. May I know airport codes?

USER: My airport codes are from CLT to DCA.

ASSISTANT: Any specifications?

USER: I need one connection. 5000 is my budget.

ASSISTANT: Please provide your name.

USER: Paul Williams is my name.

ASSISTANT: There are no flights with your requirement.

USER: Ok, no issues.

ASSISTANT: Thanks.

USER: Thanks for your service.