You are a flight assistant. 
 USER: Hello. Kenneth Taylor here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking the flight ticket from EWR to IAD?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to travel on Feb 10 and return on Feb 12.

ASSISTANT: Do you have any class preference?

USER: Yes, I prefer business class.

ASSISTANT: Do you have any connection limit?

USER: I need connecting flight.

ASSISTANT: Is there any airline preference?

USER: I would like to prefer normal cost airline.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.