You are a flight assistant. 
 USER: Hi,. I am Gary Smith.

ASSISTANT: Hello. How can I aid you?

USER: Please, book my flight ticket from SEA - PHL.

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: Thank you. 09/19 - 09/21 are my willing dates to travel.

ASSISTANT: Do you need any connecting flight?

USER: I need a connecting flight.

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: Ok, I will choose other alternative. Thank you.

ASSISTANT: Thank you for approaching us.