You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking a flight ticket from IAH to IAD?

ASSISTANT: Sure, can you please share your trip dates?

USER: I would like to travel on Dec 31 and return on Jan 02.

ASSISTANT: Do you have any connection limit?

USER: I need connecting flight.

ASSISTANT: Let me know your class preference?

USER: I prefer business class.

ASSISTANT: Any other requirements to be met?

USER: I prefer normal cost airline.

ASSISTANT: May I know your name please?

USER: Kimberly Lewis here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.