You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Nelson.

ASSISTANT: What type of service you are expecting from us?

USER: I have to attend a Music Concert at Detroit, could you please help me with booking a flight ticket from SFO to DTW?

ASSISTANT: Sure, I am here to help you with that. Can I know your journey dates?

USER: I would like to depart on Jan 31st and return on Feb 2nd.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a connecting flight in normal- cost airlines.

ASSISTANT: Do you have any other requirements?

USER: Make sure that my return time must be evening.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.