You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Anna Hernandez.

ASSISTANT: How can I assist you Anna?

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'll definitely help you with that. May I know your travel dates please?

USER: Sure, I would like to take off on 1/30 and return back on 02/01.

ASSISTANT: Ok, please wait a moment.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

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

ASSISTANT: Thank you for choosing us.

USER: You are welcome.