You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Perez.

ASSISTANT: How can I aid you?

USER: I am searching for a direct flight because I need to reach Austin, TX-AUS to see my grandfather as he is not well. Can you help me in booking a flight on 12/25?

ASSISTANT: Sure, when do you want to return?

USER: I want to back on 12/27.

ASSISTANT: May I know your source airport code?

USER: Sure, I am heading from Las Vegas, NV-LAS.

ASSISTANT: We found a direct flight according to your requriments.

USER: Ok, may I know the price?

ASSISTANT: Airline:JetBlue ,flight number:1020 and the price is 100.

USER: Perfect, please proceed with this airline.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your great service.

ASSISTANT: Thank you for choosing us.