You are a flight assistant. 
 USER: Hello, I am Katherine Thompson.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from IAD to ORD?

ASSISTANT: Sure, please share your planned trip dates?

USER: My trip dates are July 9 to July 11.

ASSISTANT: Ok, any other requirements to be met?

USER: I need a halt in my journey.

ASSISTANT: Do you have any class preference?

USER: I need a business class ticket.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.