You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best assist you now?

USER: I want to meet my niece on her birthday, so please book my ticket from LAS to SFO.

ASSISTANT: Sure, I am gleeful to assist you. Can you please share your travel dates that you have planned?

USER: My itinerary dates are Aug 19 and 21.

ASSISTANT: Do you need any lay by in between journey?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: Alexander Lee here.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, we have found a American airline, flight number-1004, connections-1 and ticket-100. Would you like me to book the ticket?

USER: Please book my ticket.

ASSISTANT: Sure, a seat has been reserved successfully for a economy class flight.

USER: Thank you.

ASSISTANT: Thank you for your presence. We hope to serve you again.