You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need a direct flight to Dallas on 12/16 to meet my childhood friend, can you help me with it?

ASSISTANT: Sure, can I know your airport codes?

USER: From CA-OAK to TX-DFW.

ASSISTANT: May I know your journey date?

USER: My return date is on 12/18.

ASSISTANT: The flight 1028 of AA airlines available with a price 400. The flight is with 1 connection.

USER: Can you check it with the price 200?

ASSISTANT: Can I know your name?

USER: I am David Collins.

ASSISTANT: Sorry Collins, there are no flights with a price of 200.

USER: Ok then, thank you.

ASSISTANT: You are welcome.