customer: Hello. 
 agent: Hello, How exactly I can serve you the best today? 
 customer: Can you please help me to book a flight from IAD to LAX? 
 agent: Sure, may I know your good name? 
 customer: My name is John Hernandez. 
 agent: On which dates would you like me to book a flight ticket for you? 
 customer: I want to depart on Dec 2 and need to return on Dec 4. 
 agent: Do you have any preferences? 
 __ 
 agent: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions. 
 customer: Ok, no problem. Thank you for the information. 
 agent: Thank you for reaching us.
customer: I need a connecting flight with an business class.