You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from DCA to SFO?

ASSISTANT: Sure, please share your planned trip dates?

USER: My travel dates are Apr 8 to Apr 10.

ASSISTANT: Can I have your name please?

USER: My name is Amanda Hernandez.

ASSISTANT: Let me know your connection limit?

USER: I need a single connection of flight.

ASSISTANT: Any other requirements to be met?

USER: I prefer business class.

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

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.