You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit Lady Bird Lake at Austin, could you please help me with booking a flight ticket from HOU to AUS?

ASSISTANT:  I am here to help you with your concern. Sure, can you please let me know your trip dates?

USER: I would like to depart on Feb 25th and return on Feb 27th.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I am comfortable with any flight.

ASSISTANT: Are you comfortable with economy class flight or business class flight?

USER: I am comfortable with any class.

ASSISTANT:  Could you help me with your name please? So, I can check for the flights availability.

USER: I am Christine Lee.

ASSISTANT: There is a flight available for the mentioned and also which match your needs, Spirit Airlines is having a direct flight with 1021 flight number and airfare is 100. Are you comfortable with this flight?

USER: Yes, please confirm the booking.

ASSISTANT: Your flight ticket has been booked.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for opting us.