You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to travel from LAS to CLT, can you help me in doing that?

ASSISTANT: Sure, please share me your trip dates.

USER: I am willing to travel on Aug 31 and return on Sep 02.

ASSISTANT: Is there any class preferences for you?

USER: I need business class.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a direct flight.

ASSISTANT: May I know your airlines preferences ?

USER: I prefer with normal-cost airline.

ASSISTANT: Please mention your good name.

USER: I am Deborah Wilson.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues, Thank you for the information.

ASSISTANT: Thank you for opting us.