You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit a Lady Bird Lake in Austin, so please book a flight ticket from LGA to AUS.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I will start on July 21, return on July 23.

ASSISTANT: Do you require any stopovers in your journey?

USER: No, I want direct flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I do not have any other requirements.

ASSISTANT: May I know your name please?

USER: My name is Robert Gonzalez.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Ok.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.