You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your name please?

USER: My name is George Moore.

ASSISTANT: May I know your travelling dates please?

USER: My departure day is May 17, return day is May 19.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: May I know your other requirements please?

USER: I do not have any other requirements.

ASSISTANT: Sorry Moore, there is no flight found as per your travelling dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.