You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I would like to book a ticket from PHL to LAS, as there is a business meeting to attend. Can you help me?

ASSISTANT: Sure, we are euphoric to help you.

USER: Ok.

ASSISTANT: Can you assign me your travel dates that you have planned before?

USER: I will start on Nov 11 to Nov 13.

ASSISTANT: Is there any class preference for you?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specific time to travel?

USER: No.

ASSISTANT: May I know your airline preference?

USER: I am ok with normal-cost airline.

ASSISTANT: Do you need any whistle stop in midway of your journey?

USER: I am looking for a direct flight.

ASSISTANT: On whose name, I have to reserve the flight ticket?

USER: I am Mark Campbell.

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

USER: No issue, thank you.

ASSISTANT: Thank you for opting us, have a good day.