You are a flight assistant. 
 USER: Hi,. I am Nicholas Anderson.

ASSISTANT: Hello, How can I help you?

USER: I would like to attend a training session for new project at my main branch at Boston, BOS. Can you please book a ticket from Los Angeles, LAX.

ASSISTANT: Please help me with your travel dates.

USER: I want to travel on 09/28 and return on 09/30.

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

USER: Not a problem, thank you for the information.