You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight to visit my Hometown, so please help me in booking a flight from PHX.

ASSISTANT: Sure, let me know your destination code?

USER: My destination airport code is OAK.

ASSISTANT: May I know your travelling dates?

USER: My planned dates are on July 28th to 30th.

ASSISTANT: Is there any class preference?

USER: I need a flight in business class.

ASSISTANT: May I know your name?

USER: Sure, my name is Edward Green.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: No issues, thank you.

ASSISTANT: Thank you for availing us.