You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I am William Thompson, I would like to travel from Boston on 06/23. Can you help me for booking under the price limit of 200?

ASSISTANT: Sure, I'm blissful to help you. Do you need any stop over?

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

ASSISTANT: Could you please share your airport codes to proceed further?

USER: Sure, my source is Boston, MA - BOS. Destination is Washington, DC - DCA.

ASSISTANT: When do you like to return?

USER: I would like to return on 06/25.

ASSISTANT: Thanks for providing the information, please wait a moment.

USER: Sure.

ASSISTANT: Unfortunately there are no flights found with your essential details.

USER: Ok, no problem. Thanks for your assistance.

ASSISTANT: Thanks for opting us, have a great day.