You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, please let me know your good name?

USER: I am Larry Hernandez. I want to travel on 10/29 to 10/31.

ASSISTANT: Ok Larry. Can you please tell me your trip airport codes?

USER: Sure. My airport cods are PHX to MSP.

ASSISTANT: Ok, please wait a minute. I will revert you.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there are no flights available in your route. Due to some climatic changes, some of the flights are not available on the dates you planned.

USER: That' ok. Thank you for your help.

ASSISTANT: Keep contacting our services, have a nice day.