You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am looking for a flight from DTW to OAK, can you help me ?

ASSISTANT: Sure, may I know the planned travel dates?

USER: My travelling dates are 09 to 11 of Sep.

ASSISTANT: Please provide me the specifications.

USER: I would like to travel in business class with a connecting flight.

ASSISTANT: May I know the name?

USER: I am Stephanie Carter.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for reaching us.