You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please make a reservation from LAS to IAH to attend a meeting in Houston?

ASSISTANT: Sure, can you please let me know your journey dates?

USER: My journey dates are on July 21st and July 23rd.

ASSISTANT: May I know your name please?

USER: My name is George Lee.

ASSISTANT: Do you have any preferences?

USER: I prefer a flight with single connection.

ASSISTANT: We found a connecting flight 1000 from Delta airline with a fare of 200.

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.