You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Anna Lee.

ASSISTANT: How may I aid you today?

USER: I am planning to travel from ORD to BOS to attend my sister's wedding anniversary, can you please help me with booking a flight ticket?

ASSISTANT: Yes sure. May I know your travelling dates?

USER: Sure, I would like to take off on 08/23 and return back on 08/25.

ASSISTANT: Thank you for your details.

USER: You are welcome.

ASSISTANT: Please hold on for a moment. Thank you for waiting.

USER: Sure, make sure that the price limit should not exceed 1000.

ASSISTANT: Sorry, there is no flight is available with your details. Thank you for choosing us, have a nice day.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Welcome.