You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to travel from SFO to DTW, can you help me?

ASSISTANT: Sure, I am here to help you for this. When are you planning your trip?

USER: My trip dates are 12/16 and 12/18.

ASSISTANT: May I know your name please?

USER: I am Ruth Nelson.

ASSISTANT: Is there any connection limit?

USER: I need a single connection flight.

ASSISTANT: Do you have any other specifications regrading your journey?

USER: My return must be in afternoon.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: That's ok. Thank you.

ASSISTANT: You are most welcome.