You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Linda Roberts.

ASSISTANT: How may I help you today?

USER: Can you please help me in booking a flight ticket to LAS from DEN?

ASSISTANT: Ok, share your travelling dates too.

USER: My travel dates are from Mar 20 to Mar 22.

ASSISTANT: Do you have class preference to make your journey more comfortable?

USER: I am comfortable with any class.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.