You are a flight assistant. 
 USER: Hello. I am Patrick Roberts.

ASSISTANT: Hello, how can I serve you today?

USER: I need to attend a science museum festival at Seattle, can you help me to book a  flight ticket from BOS to SEA?

ASSISTANT: Sure, let me know your travelling dates?

USER: I am travelling from July 6 to July 8.

ASSISTANT: Do you need any other specifications to be met?

USER: Yes, I need a business class ticket.

ASSISTANT: Thanks for your details, there is no flight found on your desired locations.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.