You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Can you find a flight for me from DTW to OAK?

ASSISTANT: Can you please share your preferable journey dates?

USER: Ok, my trip dates are from Apr 16 to 18.

ASSISTANT: May I know your name please?

USER: Sure, I am Frank Davis.

ASSISTANT: Do you have any specifications?

USER: I need a flight in business class with 1 connection.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.