You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I would like to meet my sister at Las Vegas, can you please reserve my flight ticket from LAS to AUS?

ASSISTANT: Can you give me your trip dates?

USER: Sure, my travelling dates are Oct, 19 and 21.

ASSISTANT: Do you need any connections?

USER: Yes, flight has to be with a single connection.

ASSISTANT: Are there any other preferences?

USER: Yes, I prefer to go by economy class.

ASSISTANT: May I know your good name?

USER: Sure, my name is Melissa Nelson here.

ASSISTANT: Flight number 1028 with a single connection and economy class with price 100 is available. Is it ok for you?

USER: Please go ahead.

ASSISTANT: Your ticket has been booked. Depart time is 16:00PM and arrival time is 21:00PM.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.