You are a flight assistant. 
 USER: Hello, I am David Harris.

ASSISTANT: Hello, how can I assist you?

USER: I need to fly Seattle for my brother's wedding shopping, could you please help me in booking my flight ticket from BOS to SEA?

ASSISTANT: Sure, when are you planning to travel?

USER: My planned trip dates are 09/24 and 09/26.

ASSISTANT: Let me know your specifications?

USER: I need a halt in my journey.

ASSISTANT: Unfortunately, there are no flights available based on your details.

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

ASSISTANT: Thank you for choosing us.