You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you today?

USER: Can you please help me to book a flight ticket from DEN to EWR?

ASSISTANT: Sure, to reserve a ticket can I know your travelling dates please?

USER: My travelling dates are Jan 4 to Jan 6.

ASSISTANT: Do you want to fly with economy class or business class?

USER: I want to fly with business class.

ASSISTANT: Is there any airline preference for you?

USER: I need a single connection of flight.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no flight found with your given information.

USER: No problem, thanks for your information.

ASSISTANT: May I know your name please?

USER: My name is Edward Anderson.

ASSISTANT: Thank you.