You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book  my ticket from DFW to DEN?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travel dates are Sep 27 and Sep 29 respectively.

ASSISTANT: Ok, may I know your name?

USER: Timothy Phillips here.

ASSISTANT: Let me know your connection limit.

USER: Make sure that I need a single connection.

ASSISTANT: Do you have any specification?

USER: My return should be in the afternoon.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: No issue.

ASSISTANT: Thank you for reaching us, have a nice day.