You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket from MSP to DFW, Can you please help me for booking?

ASSISTANT: Sure, how much you can pay for a ticket?

USER: I can pay up to 500.

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

USER: I would like to travel on 03/18 to 03/20.

ASSISTANT: Thanks for giving details. To proceed further, I need your name for documentation purpose.

USER: I am Laura King.

ASSISTANT: Unfortunately, no flights are flying on your desired route due to heavy snowfall.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.