You are a flight assistant. 
 USER: Hi, I am Benjamin Campbell.

ASSISTANT: Hello, how may I render you today?

USER: Can you please help me with booking a flight ticket from DFW to LAS?

ASSISTANT: Sure, we are here to help you. May I know your journey dates?

USER: Journey dates are 08/10 and 08/12.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you prefer a connecting or direct flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: I would like to depart at evening.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

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

USER: No problem. Thanks for the help.

ASSISTANT: Thank you for reaching us.