You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to travel Las Vegas, can you please reserve normal-cost flight ticket from PHL and LAS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Dec,18 and Dec,20.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a single connection for my travel.

ASSISTANT: Thank you, may I know your name for the documentation purpose?

USER: Myself Joshua Brown and I need a business class flight ticket.

ASSISTANT: Do you have any specific depart and arrival time for this journey?

USER: No, I have mentioned all my specification.

ASSISTANT: Thank you, please wait for a moment.

USER: Sure, please take your time.

ASSISTANT: Unfortunately, no flights are available on your requirement dates.

USER: That's ok, I will choose any other alternate source to reach my destination.

ASSISTANT: Welcome, thank you for reaching us.