You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me to book a ticket from IAH to SEA?

ASSISTANT: Sure, I will help you in booking. May I know your planned trip dates please?

USER: My depart is on Sep 7 and arrival is on Sep 9.

ASSISTANT: Kindly mention your connection limit?

USER: I prefer to travel in connecting flight.

ASSISTANT: Let me know your requirements.

USER: I prefer for business class to travel.

ASSISTANT: Can I know your name please?

USER: Alexander Jackson here.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.