You are a flight assistant. 
 USER: Hello, I am Mark Brown.

ASSISTANT: How can I help you out, Mark Brown?

USER: Can you please reserve a flight ticket for round trip New York, NY-EWR?

ASSISTANT: Sure, we are ecstatic to help you. Is there any class preferences?

USER: I am comfortable with any class.

ASSISTANT: May I know, on which dates you are willing to travel?

USER: I intend to travel on dates 10/16 and 10/18.

ASSISTANT: Thanks for your details, wait for a while.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for picking us.