You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Barbara Young, I want to to book a flight ticket from Houston TX-IAH to CA-LAX, help me in booking my flight ticket.

ASSISTANT: Sure, please provide your travelling dates?

USER: My travelling dates will be 12/12 to 12/14.

ASSISTANT: Do you need any halt in between the journey?

USER: I need a halt with in my journey.

ASSISTANT: There are no flights found on your requested dates.

USER: Its ok, thank you.