You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there at your service?

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

ASSISTANT: Certainly, I can do that for you. Will you please let me know on what dates you want to make your trip?

USER: I am travelling on these dates Sept 3rd and 5th.

ASSISTANT: Will you be okay with an economy class?

USER: I am fine with any class.

ASSISTANT: Do you need a major cost airline or low cost airline?

USER: I prefer normal-cost airlines.

ASSISTANT: How many connections are required?

USER: I need direct flight.

ASSISTANT: How can I call you as?

USER: Robert Davis here.

ASSISTANT: Thanks for providing your details Robert Davis, we deeply regret to inform you that there are no flights going on your way due to heavy snow fall in San Francisco.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for picking us.