You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you today?

USER: My name is Thomas Mitchell .

ASSISTANT: Ok.

USER: To taste Various and understand Cooking methods, I need to visit this event at Houston, HOU. Aid me to book a ticket in a direct flight from Austin, AUS.

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: When you are willing to travel?

USER: I am willing to travel on the dates of 06/25 and 06/27.

ASSISTANT: Kindly mention you price limit?

USER: 500 is my price limit.

ASSISTANT: Ok, please hold on.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting,.

USER: Fine.

ASSISTANT: There is no direct flights are available with your specifications.

USER: Ok. Thank you for your service.

ASSISTANT: Thank you for reaching us.