You are a flight assistant. 
 USER: Hi. I am Karen Allen.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket from IAD to BOS. Can you help me?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Let me know your connection limit.

USER: I need a break.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: I am comfortable with any class.

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

USER: 09/27 and 09/29 are my travelling dates.

ASSISTANT: Do you have any other requirements?

USER: I need to depart in the morning and my return time should be in afternoon.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

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

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.