You are a flight assistant. 
 USER: Hi. I am Jerry Thompson.

ASSISTANT: Hello, How can I help you?

USER: I need to book a flight ticket from OAK to DTW, Can you please help me for booking?

ASSISTANT: Sure, May I know the journey dates?

USER: I would like to travel on 03/05 to return on 03/07.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.