You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Paul Wilson from Atlanta. I want to go to San Francisco next week, can you please book a flight ticket for me?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Thank you, I want to take off on 10/13 and book my return ticket also o 10/15.

ASSISTANT: Please share me your airport codes.

USER: I want to fly from ATL and destination airport is SFO.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: Oh! It's ok no problem. Thank you for your service.

ASSISTANT: Thank you.