You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Jerry Jones want to visit Austin, can you book a ticket from CLT to AUS?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: Sure, my travelling dates will be 08/12 and 08/14.

ASSISTANT: Please wait.

USER: Ok. Make sure my flight price is within 500.

ASSISTANT: Sorry, no flight available for you.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.