You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I would like to meet my family after a long gap at Boston, please help me in booking a ticket from IAD to BOS.

ASSISTANT: Sure, I can help you. Kindly assign your preferred dates of travelling?

USER: My journey dates are 10/25 and 10/27.

ASSISTANT: May I know your name?

USER: My name is Paul Wilson.

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 information.

ASSISTANT: Thank you for reaching us.