You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Jonathan Lopez here.

ASSISTANT: Ok.

USER: Please help me out in booking the ticket from DEN to DFW.

ASSISTANT: Sure, I would be happy to help you. Let me know your connection limit.

USER: Yes, 1 connection.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: No class required.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates will be July 23 to July 25.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.