You are a flight assistant. 
 USER: Hello. I am Gary Jackson.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please book a flight ticket from OAK to SFO?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Do you need a stopover in between your journey?

USER: Yes, I need connection 1.

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

USER: I am ok with any class.

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

USER: I have planned to travel on dates of Jan 26 and Jan 28.

ASSISTANT: Do you have any other requirements?

USER: Yes, I would like to depart in evening time.

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

USER: Sure, take your time.

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

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.