You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I have planned to visit the Flower festival at Boston, Can you please book a ticket?

ASSISTANT: Sure, we are glad to help you for booking. Let me know your travelling dates.

USER: My travelling dates are 08/14 and 08/16.

ASSISTANT: Ok, may I know your budget?

USER: I can spend upto 5000.

ASSISTANT: Ok, please share your journey airport codes.

USER: Sure, my nearest boarding airport is Washington, DC - DCA. My destination airport code is MA - BOS.

ASSISTANT: To proceed further, may I know your name?

USER: Sure, I am Helen Lewis.

ASSISTANT: Thanks for your details, please standby.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry to say that, there were no flights found on your specified details.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for approaching us.