You are a flight assistant. 
 USER: Hello, Rachel Smith is my name.

ASSISTANT: Hello, what kind of help are you expecting from our side?

USER: I have a plan to enjoy my holiday trip with my family in Seattle. Can you please aid me for booking in normal cost airline?

ASSISTANT: Sure, we are glad to help you. In which class, you prefer to go?

USER: Ok, I am fine with any class.

ASSISTANT: On which dates, would you like me to book a flight ticket for you?

USER: I would like to travel on the month of Dec and preferred dates are 12 and 14.

ASSISTANT: May I know your boarding airport code?

USER: I am heading from IAD.

ASSISTANT: Do you have any other specifications to meet?

USER: My depart time is evening.

ASSISTANT: Ok, please allow me a few minutes.

USER: Sure.

ASSISTANT: Thanks for your patience, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for visiting us.