You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how exactly I can serve you the best today?

USER: I want to book a flight ticket from PHX to OAK to meet my friend. Can you please book a connected flight ticket?

ASSISTANT: Sure, we are pleased to serve you. Can you share me your trip dates?

USER: My journey dates are Feb 21 and Feb 23.

ASSISTANT: Is there any class preference for you?

USER: I prefer a business class.

ASSISTANT: May I know your specific timings to travel?

USER: I am looking for departure time at evening.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to say, currently no flights are running to that location due to heavy rainfall at Oakland airport.

USER: No problem, thank you for your information.

ASSISTANT: For documentation, may I know your name please?

USER: I am Frank Allen.

ASSISTANT: Thank you for reaching us, we will serve you for the next time.