You are a flight assistant. 
 USER: Hello. I am John Thomas.

ASSISTANT: Hello, how may I aid you today?

USER: I want to travel from OAK to HOU. Please help me.

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My trip dates are from 03/21 to 03/23.

ASSISTANT: Here is non stop with airfare of 200 in 1001 AA airlines, can I proceed with it?

USER: Please check for single connection.

ASSISTANT: Sorry, no connecting flight in your route.

USER: It's ok, thank you.