You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

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

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates are Apr 23 and Apr 25.

ASSISTANT: Are you ok with connecting flight?

USER: Yes.

ASSISTANT: May I know your name to book the flight ticket?

USER: Michelle Wright here.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the morning.

ASSISTANT: Please be on hold to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your requested dates of travelling.

USER: It's ok, thank you.

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