You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Thomas Lee.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Yes, I will book the ticket for you with the intents you have provided. May I know the travel dates?

USER: Sure, I would like to take off on 04/23 and return back on 04/25.

ASSISTANT: Ok, thank you for waiting, I did not get any flights which are travelling on the route which you had asked for. Sorry for the inconveniences.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you connecting with our agency with your concerns.