You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please book me a flight ticket from SFO to DTW to meet my family.

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

USER: I have planned to travel on July 14th and return on July 16th.

ASSISTANT: Do you need a connection in between your journey?

USER: Yes, I prefer connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I want to return at evening time.

ASSISTANT: May I know your name?

USER: Myself Brenda Campbell.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.