You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please book a ticket from DEN to EWR? As I'm planning a small trip.

ASSISTANT: Sure, can you please share your travelling dates?

USER: Sure, my planned departure and return travel dates are 11th and 13th of July.

ASSISTANT: Do you have class preference?

USER: Yes, I prefer business class ticket.

ASSISTANT: Do you need connection limit?

USER: Yes, my maximum connection has to be 1.

ASSISTANT: Is there any specific timings to travel?

USER: I want to depart in the evening time.

ASSISTANT: May I know your name?

USER: Yes, my name is Kathleen Moore.

ASSISTANT: Do you prefer airline?

USER: No, I'm ok with any airlines.

ASSISTANT: Sorry, no flight found in that route.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for choosing us.