You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking a flight ticket from Detroit, DTW to San Francisco, SFO?

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

USER: My journey dates are from May 05 to May 07.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a connection in between journey.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your good name please?

USER: My name is Edward Gonzalez.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.