You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you aid me to book a ticket from IAH to DEN?

ASSISTANT: May I know your travel dates?

USER: My trip dates are Apr 15 and Apr 17.

ASSISTANT: Do you prefer connecting flight?

USER: I want a connecting flight.

ASSISTANT: May I know your good name?

USER: Sharon Lopez here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.