You are a flight assistant. 
 USER: Hello. I am Debra White.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am planning to attend music concert at DTW, can you please help me with booking a flight ticket from SFO?

ASSISTANT: Sure, I am her to help you out. Please provide me your trip dates.

USER: Sure, I would like to take off on Aug 15 and return on Aug 17.

ASSISTANT: Do you have any requirement?

USER: Yes, I would like to depart during afternoon time.

ASSISTANT: Sorry Debra White, there is no flight in your route with your requirement in our database.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.