You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Please inform me how can I best serve you now?

USER: I want to travel in a business class flight for my journey, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: Can you please provide me your airport abbreviates?

USER: Sure, I want to travel from ORD to BOS.

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

USER: My departure is on Apr 13 and please book my return ticket also on Apr 15.

ASSISTANT: Do you prefer any lay by in between journey?

USER: Yes.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: Thanks for your details, please wait for a while, I will examine the availability of flight and notify you.

USER: Sure.

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

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for checking.

ASSISTANT: May I know your good name please?

USER: My name is Jack Lewis.

ASSISTANT: Ok, Thanks for choosing us, wish you a great day.

USER: Welcome.