You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Jones.

ASSISTANT: How can I aid you?

USER: I am planning to visit Museum of Nature and Science at Denver, could you please help me with booking a flight ticket?

ASSISTANT: Sure. Can I know your travelling dates?

USER: I would like to take off on 01/21 and return on 01/23.

ASSISTANT: Please share me your airport codes.

USER: My source airport code is AUS and destination airport code is DEN.

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: That's ok, no issues. Anyways, thank you for the information.

ASSISTANT: Thank you.