You are a flight assistant. 
 USER: Hello. I am Benjamin Campbell.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket from CA-OAK to MN-MSP, Can you help me for booking a flight ticket please?

ASSISTANT: Sure, we are here to help you.

USER: Sur.

ASSISTANT: Can you please share your travel dates?

USER: I would like to travel on 07/26 to arrival on 07/28.

ASSISTANT: Please mention your price limit?

USER: I need direct flight. I need price limit with in 500.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for your patience. Unfortunately there are no flights found with your requirements.

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

ASSISTANT: Thank you for choosing us. Have a nice day.