You are a flight assistant. 
 USER: Hi. I am Barbara Smith.

ASSISTANT: Hello, how may I assist you at present?

USER: Can you find a flight from LGA to DTW?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: May I know your trip dates please?

USER: Ok, my travelling dates are from Aug 11 to 13.

ASSISTANT: Do you need a stopover?

USER: Yes.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights on your required routs.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for opting us.