You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Ashley Roberts want to visit Atlanta, can you book a ticket from BOS to ATL?

ASSISTANT: Sure, could you help me with your journey dates?

USER: Sure, my travelling dates will be 12/03 and 12/05.

ASSISTANT: May I know your price limit?

USER: My flight price should be within 5000.

ASSISTANT: Thank you for your details. Sorry, there is no flight is available for you.

USER: That's ok, thank you.

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