You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Larry Brown, I want to book a flight ticket to Washington DC-DCA. Can you assist me in booking my flight ticket from Minneapolis MN-MSP?

ASSISTANT: Sure, please share me your travelling dates?

USER: 02/29 to 03/02 are my travelling dates.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight with a fare of 500.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights with your specifications.

USER: Its ok, thank you for your effort.

ASSISTANT: Thank you for reaching us.