You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Samuel Williams. I want to see Lake Merritt at Oakland with my brother, I want to book a ticket.

ASSISTANT: That sound's good, may I know your travelling dates?

USER: Sure, I would like to travel on 01/28 to 01/30.

ASSISTANT: Could you help me with your airport codes?

USER: My airport codes are from HOU to OAK.

ASSISTANT: There is a flight with your requirements in AA airlines with 0 connection. May I proceed?

USER: I want the flight with 1 connection.

ASSISTANT: I am sorry, your flight is available with 0 connection.

USER: Ok, I don't want it.Thank you for your help.

ASSISTANT: Welcome.