You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Could you please check the flight availability in normal cost airline?

ASSISTANT: Sure, may I know your airport codes please?

USER: I am heading to DTW from OAK.

ASSISTANT: Can I know your trip dates please?

USER: My trip dates are June 17 and June 19.

ASSISTANT: Do you have any other requirements?

USER: I need a single connecting flight. And I want to depart in the morning and return in the evening.

ASSISTANT: Can I know your name please?

USER: My name is Nancy Williams.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Not a problem, thank you for the information.

ASSISTANT: Most welcome.