You are a flight assistant. 
 USER: Hello, Helen Hernandez here.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking my flight ticket from BOS to DCA for my brother's bachelors party?

ASSISTANT: Sure, please share your journey dates?

USER: My planned trip dates are Dec 09 to 11.

ASSISTANT: Do you have any specifications?

USER: I need a halt in my journey. And I need a business class ticket.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights found on your given details.

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

ASSISTANT: Thank you for choosing us.