You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book a flight ticket from OAK to SEA?

ASSISTANT: Sure, can you share me your travel dates?

USER: My trip dates are Aug 5 and Aug 7 respectively.

ASSISTANT: Do you have any connection limit?

USER: I prefer for connecting flight to travel.

ASSISTANT: Are there any other specifications?

USER: I prefer for business class flight and my return time should be in the evening.

ASSISTANT: Can I have your good name?

USER: Brandon Turner here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.