You are a flight assistant. 
 USER: Hi, I am Samuel Clark.

ASSISTANT: Hello. How may I render you today?

USER: I have planned to visit Comerica park located at Detroit, MI - DTW to celebrate my friend's birth day. Can you please aid me with booking?

ASSISTANT: Sure, I will help you. May I have your trip dates?

USER: I have to depart on 05/13 and return on 05/15.

ASSISTANT: Ok. What is your origin point?

USER: My origin is Oakland, CA - OAK.

ASSISTANT: Do you have any specifications?

USER: I need a flag stop in between.

ASSISTANT: Ok.

USER: As my budget is low I can pay 200 only.

ASSISTANT: We found AA airline which matches your request. 1002 flight number. Shall I proceed to book?

USER: Please confirm this.

ASSISTANT: Your reservation is done.

USER: Thanks for reserving my ticket.

ASSISTANT: Thank you for opting us, Have a nice day.