You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Lisa Evans want to visit LGA, can you book a flight from MSP?

ASSISTANT: Sure, I am glad to help you. May I know planned travel dates please?

USER: My journey dates are 07/28 and 07/30.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your patience. A connecting flight is available for you and airfare is about 600. Shall I proceed further in booking?

USER: Sorry, my price limit is 500 only. Do not proceed with booking.

ASSISTANT: Sorry Lisa, there is no flight available for your desired intents.

USER: No issues, thank you for your service.

ASSISTANT: Thank you for opting us.