You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please assist me in reserving a flight ticket to DTW from OAK?

ASSISTANT: Sure, provide me with the journey dates please.

USER: I am planning to start on Aug 12 and need to return on Aug 14.

ASSISTANT: Is there any connection preference?

USER: I need a connecting flight.

ASSISTANT: May I know the class preference?

USER: I want to fly in normal cost airline in economy class.

ASSISTANT: Are there any more preferences?

USER: No.

ASSISTANT: May I know your name please.

USER: I am Jeffrey Wright.

ASSISTANT: I regret to inform that there are no flights on your route with the given dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.