You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are Dec 18 to Dec 20.

ASSISTANT: Do you have any specifications?

USER: I need a flight with single connection.

ASSISTANT: May I know your good name please?

USER: My name is Ashley Campbell.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.