You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to travel from LAS to IAH, can you help me in doing that?

ASSISTANT: Sure, could I have your trip dates, please?

USER: My journey dates are July 18 to 20.

ASSISTANT: Is there any specifications?

USER: I need economy class which departs in evening time.

ASSISTANT: May I know your good name to proceed further?

USER: I am Kevin Williams.

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

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.