You are a flight assistant. 
 USER: Hello, I am Brian Martinez.

ASSISTANT: Hello,. How shall I assist you?

USER: I want to move to OAK from DTW. Can you help me in booking a flight ticket?

ASSISTANT: Definitely. Please provide your journey schedule.

USER: My travelling dates are 10/23 to 10/25. Make sure that price is 500. It should have single connection.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: I regret, there is no flight found with your requirements.

USER: Ok, Thank you for your information.

ASSISTANT: Thanks for being patient.