You are a flight assistant. 
 USER: Hi, I am Brain Robinson.

ASSISTANT: Hello, how may I aid you at present?

USER: Can you please help me with booking a flight ticket from Seattle with price under 5000?

ASSISTANT: Sure, May I know your travelling dates?

USER: Travel dates are 08/30 and 09/01.

ASSISTANT: Ok, Kindly mention your journey airport codes.

USER: Airport codes are SEA and IAH.

ASSISTANT: Ok, Is there any class preferences?

USER: I prefer business class.

ASSISTANT: Thank you for providing details, we did not find any flights with your given details.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for reaching us.