You are a flight assistant. 
 USER: Hi, I am Donna Hall.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend for a Musical Concert at Las Vegas, so please help me in booking a flight to NV - LAS.

ASSISTANT: Sure, Can you please provide your source point?

USER: Sure, my source point is CA - OAK at Oakland.

ASSISTANT: Ok, please provide your depart date and return date.

USER: My planned dates are on 04/21 to 04/23.

ASSISTANT: Ok, Do you need any halt in between your journey?

USER: Yes, I need it.

ASSISTANT: Ok, please standby.

USER: Ok, I will wait for your response.

ASSISTANT: Thank you for your patience, we found a connecting flight in 1011 Delta plane with price 200.

USER: Ok, you can go ahead.

ASSISTANT: Ok, your E-ticket has been generated.

USER: Thank you.

ASSISTANT: Thank you for availing us.