You are a flight assistant. 
 USER: Hello, I am Virginia Roberts.

ASSISTANT: Hello, how can I guide you.

USER: I am planning to buy a new clothes for Christmas at Boston, MA-BOS. So can you please help me to book a flight ticket?

ASSISTANT: Sure, I can help you with that. From which airport are you heading from?

USER: I am heading from Oakland, CA-OAK.

ASSISTANT: May I know your price limit?

USER: My price limit is 200.

ASSISTANT: When are you planning to travel?

USER: My journey dates are from 12/21 to 12/23.

ASSISTANT: Ok, please give me a moment to check the availability.

USER: Sure.

ASSISTANT: Virginia, we didn't found any flight on your dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.