You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you search for a direct flight for me?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My itinerary dates are 02/13 and 02/15.

ASSISTANT: Please share me your airport codes.

USER: I will be travelling from SFO to MSP.

ASSISTANT: May I know your name?

USER: My name is Mary Thomas.

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: It's ok, I will find an alternative way to travel.

ASSISTANT: Thank you.

USER: Thank you for your service.