You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how could I assist you?

USER: I am Nicole Brown.

ASSISTANT: Ok.

USER: I want to go to my grand mother memorial service at Oakland, CA-OAK. Can you please help me in booking?

ASSISTANT: Sure, let me know your boarding point?

USER: I want to start my journey from LGA.

ASSISTANT: Can you please share me your travelling dates?

USER: I want to travel on 03/18, and need to catch return flight on 03/20.

ASSISTANT: Do you need any other requirements?

USER: Make sure to check a flight with in a price limit of 500.

ASSISTANT: Please wait for a while, I will check and revert to you.

USER: Sure.

ASSISTANT: We found a flight with UA airline of flight 1002. Shall I proceed for booking?

USER: It is perfect, please proceed.

ASSISTANT: Your ticket has been done successfully.

USER: Thanks for your assistance.

ASSISTANT: Thank you for communicating with us.