You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how best I can serve you at this moment?

USER: Could you please book a flight ticket from LAS to DCA as I want to attend a flower festival?

ASSISTANT: Sure, can you please mention your class preference?

USER: I am comfortable with any class.

ASSISTANT: When you are planning to make your journey?

USER: I want to travel on May 06 and return on May 08.

ASSISTANT: Do you need connecting or direct flight in your journey?

USER: I need a direct flight in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available matching your preferred dates.

USER: Not an issue, thank you for the information.

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

USER: Sure, Gary Campbell is my name.

ASSISTANT: Thank you for opting us.