You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, how may I oblige you today?

USER: I am Ashley Walker. Can you please help me in booking my flight ticket from DFW to BOS?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My preferable dates are June 07 and June 09.

ASSISTANT: Do you have any other requirements?

USER: I need my depart flight in afternoon time. I need 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, fine thank you for checking.

ASSISTANT: Thank you.