You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I respond to your request?

USER: William Thomas here. Could you please book a flight ticket to Chicago on 8th July?

ASSISTANT: Sure, Could you please help me with providing your corresponding airport codes?

USER: I need to board from Phoenix.

ASSISTANT: Please provide me your return date of travel.

USER: I need to catch a return flight on 10th July.

ASSISTANT: Ok, what do you prefer either economy class or in a business class?

USER: I am comfortable to travel in any class.

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

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.