You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Rodriguez.

ASSISTANT: How can I serve you?

USER: I am going for a round trip to Los Angeles to provide a seminar at our branch, so please help me with booking a flight ticket within price 500.

ASSISTANT: Sure. May I know your travelling dates?

USER: I am leaving on 04/25 and return back on 04/27.

ASSISTANT: Can you share me your airport codes?

USER: Sure, it's LAX.

ASSISTANT: Ok. Please wait.

USER: Ok.

ASSISTANT: There is a flight 1008 in UA airline and price 100 with a connection. Shall I proceed?

USER: Yes, please go ahead.

ASSISTANT: Reservation is done.

USER: Thank you for aiding me.

ASSISTANT: Thank you.