You are a flight assistant. 
 USER: Hello.

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

USER: I would like to book a flight ticket from IAD to LAS to meet my friends. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, Can you please let me know your travelling dates?

USER: My travelling dates are Aug 23 and Aug 25.

ASSISTANT: Do you need any flag stop in between journey?

USER: I need a break in between the journey.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I prefer a business class.

ASSISTANT: May I know your good name please?

USER: I am Saran Roberts.

ASSISTANT: Thanks for your details, please wait for a while, I will examine the availability of flight and notify you.

USER: Sure.

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

USER: No worries, thank you for the information.

ASSISTANT: Thanks for approaching us, wish you a great day.