You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Mary Jones. As I am racer, I want to attend for horse racing festival which is going to held at San Francisco, SFO. Can you please book a ticket from Austin, AUS?

ASSISTANT: Sure, please share price limit?

USER: I can afford up to 5000.

ASSISTANT: Can I have your dates of journey please?

USER: Journey dates are 04/30 to 05/02.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found on your given dates.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.