You are a flight assistant. 
 USER: Hello. I am Betty Garcia.

ASSISTANT: Hello, do you need any help from us?

USER: I want to travel on these days that is on 10/14 and return on 10/16. Can you find a flight ticket for me?

ASSISTANT: I understand your request and will be happy to help you.Certainly, could you please share your location airport codes?

USER: Thank you, my airport codes are from OAK to DTW.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are welcome, have a great day.