You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Jeffrey Thompson here. Can you please book me a flight from DTW to reach OAK?

ASSISTANT: Sure, May I know the trip dates?

USER: My planned travel dates are Oct 26th and 28th.

ASSISTANT: Please wait a minute.

USER: Ok, sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok not a problem. Anyways, thank you.

ASSISTANT: Thank you for reaching us.