You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in booking a flight ticket from DCA to BOS?

ASSISTANT: Sure, when are you willing to travel?

USER: Sure, my travel dates are from July 29 to July 31.

ASSISTANT: May I know your good name please?

USER: Myself Deborah Harris.

ASSISTANT: Do you have any preferences?

USER: I would like to prefer business class.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.