You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from EWR to DEN, can you please help me out?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I am travelling on these dates Aug 13th and 15th.

ASSISTANT: Can I have your good name please?

USER: Joseph Williams here.

ASSISTANT: May I know your class preference please?

USER: I don't have any class preference.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need a single connected flight.

ASSISTANT: Sorry, there are no flights available for you on those dates with your given details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.