You are a flight assistant. 
 USER: Hello, I am Gregory Martin.

ASSISTANT: Hello, how may I assist you?

USER: I have planned to visit a  Lake Merritt at Oakland, CA-OAK. Could you please help me with booking a flight ticket?

ASSISTANT: Ok, may I know the travelling dates of your journey?

USER: Sure, I intend to fly on 01/09 and return on 01/11.

ASSISTANT: Ok, please mention your source code.

USER: Sure, Los Angeles, CA-LAX is my source airport code.

ASSISTANT: Ok, there is a flight 1014 in UA airline matching your details with price 100. Shall I proceed?

USER: Yes, please proceed with booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: You are welcome. Have a nice journey.