You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Hill.

ASSISTANT: How may I guide you today, Hill?

USER: I want to give a surprise to my sister by attending her convocation day on 02/02, can you please help me in booking a flight ticket?

ASSISTANT: I would be happy to help you with that, Hill.

USER: Thanks.

ASSISTANT:  From which location that you are preferring to start and where is your landing region?

USER: I will start from my city MSP and and my destination is AUS.

ASSISTANT: May I know your return date?

USER: Yes, I would like to return from AUS on 02/04. Please make sure that, I need a direct flight.

ASSISTANT: Please wait for a while, I will get back with your flight details.

USER: Sure, take your time and suggest me the best airlines.

ASSISTANT: Shirley Hill, I am sorry to say that there is no flight found under your details.

USER: That's ok. Anyway, thank you for your immediate response.

ASSISTANT: Thank you for choosing our agency. Have a great day.

USER: Thank you.