You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I have planned to book flight ticket from CLT to PHL, can you assist me?

ASSISTANT: Sure, on what dates are you planning to make your trip?

USER: My preferred dates are Dec 17th and Dec 19th.

ASSISTANT: How many connections do you need?

USER: I need single connection between my trip.

ASSISTANT: Any other requirements to be met?

USER: I need to travel in business class.

ASSISTANT: May I know your name?

USER: Nicole Davis.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for opting us.