You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to buy a flight ticket. Please help me in that.

ASSISTANT: Sure, when are you planning to travel?

USER: My travelling dates are from Mar, 28 to Mar, 30.

ASSISTANT: Which airports do you prefer to travel?

USER: My source airport code is SFO and my destination airport code is LAS.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a single connecting flight.

ASSISTANT: In which airline do you want to fly?

USER: I prefer normal-cost airlines.

ASSISTANT: Thank you for your details, we found a flight 1021 in Hawaiian airline. Shall I proceed with a class economy?

USER: Please proceed.

ASSISTANT: May I know your good name?

USER: My name  is Katherine Taylor.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you.