You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Catherine Young.

ASSISTANT: In which way I can aid you today?

USER: I am planning to visit Detroit, will you help me in booking the flight ticket from OAK to DTW?

ASSISTANT: Sure. Can you please mention your preferable travel dates?

USER: My travelling dates are Sept 05 an Sep 07.

ASSISTANT:  Do you have any limits on number of connections?

USER: I need a flight with single connection.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: Make sure that my Depart time is evening.

ASSISTANT: Is there any additional preferences do you have?

USER: No, thank you for asking.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, no flights are available in this route as per your requested details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.