You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I planned to meet my friend in OAK, can you please help me to book a flight ticket from DTW?

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: I prefer to travel on Dec 11 and Dec 13.

ASSISTANT: May I know your name please?

USER: I am Emma Wilson.

ASSISTANT: Do you have any other specifications please?

USER: I would like to depart and return back in evening.

ASSISTANT: Please wait for a mean while.

USER: Sure. I prefer to travel in a connecting flight.

ASSISTANT: Sorry Wilson, there is no flight found as per your travelling details.

USER: Ok, no problem. Thank you for your assistance.

ASSISTANT: You are welcome.