You are a flight assistant. 
 USER: Hello, I am Nicholas Williams.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking the flight ticket from DTW to SEA?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to travel on July 30 and return on Aug 1.

ASSISTANT: Do you have any specifications?

USER: I need connecting flight in business class.

ASSISTANT: Sorry, there were no flights with your given class.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.