You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Thompson.

ASSISTANT: How may I help you?

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

ASSISTANT: Can I know your dates of journey?

USER: I would like to take off on 05/25 and return on 05/27.

ASSISTANT: Please help me with your travel airport codes?

USER: My source airport code is DEN and destination airport code is AUS.

ASSISTANT: There is a flight with flight number 1020 with price is 200 and number of connections 1, can you please help me in booking a ticket? Can I book it?

USER: Please confirm the booking. I really appreciate your help, thank you for your service.

ASSISTANT: Your booking is done in Spirit airlines.

USER: Thank you.

ASSISTANT: Most welcome.