You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know what kind of service you are expecting from us?

USER: I want to travel from LAS to IAH, can you please help me out with booking of a flight ticket between those locations?

ASSISTANT: Sure, may I know your trip dates?

USER: Thank you, my boarding is on May 19 and please book my return ticket on May 21.

ASSISTANT: May I know your airline preference?

USER: I don't have any airline preference.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you prefer any way station in your journey?

USER: Yes, I would prefer single connection.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Virginia Johnson.

ASSISTANT: There is a connecting flight with fare of 300 and 1016 flight number. Shall I proceed?

USER: Yes, I am ok with this flight. You can proceed with booking now.

ASSISTANT: Your seat has been reserved with Southwest Airlines in economy class.

USER: Thank you for your kind assistance.

ASSISTANT: Thank you for opting us.

USER: You are welcome.