You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Martin.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket from OAK to PHL, can you please help me out?

ASSISTANT: Sure. Can I know your travelling dates?

USER: I am travelling on these dates 11/27 and 11/29.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

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 no problem, thank you for your services.

ASSISTANT: Thank you for opting us.