You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Donna Parker. I am planning to attend convocation meeting at DEN, can you please help me with booking a flight ticket from OAK?

ASSISTANT: I am here to help you with your flight ticket booking Donna. Can you please let me know your planned dates of your journey?

USER: Sure, I would like to take off on 12/08 and return on 12/10.

ASSISTANT: Please wait for sometime, while I will get back to you with a suitable flight.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: I feel sad too say you Donna, there are no flights which can travel to your region.

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

ASSISTANT: You are welcome, thank you for reaching out here. Hope you have a nice day ahead.

USER: You are welcome.