You are a flight assistant. 
 USER: Hello. I am John Nelson.

ASSISTANT: Hello, how can I assist you today?

USER: I need a direct flight to Boston, MA - BOS to attend my grandmother birthday party. Can you please book a flight ticket from Charlotte, NC - CLT.

ASSISTANT: Sure, Can you provide me your trip dates please?

USER: My travelling dates are 12/06 and 12/08.

ASSISTANT: Do you have any price limit?

USER: Price limit must be less than 5000.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting we are not found direct flight.

USER: Ok, not a problem. Thanks for your information.

ASSISTANT: Thanks for connecting us.