You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Please book a flight ticket in the month of Mar from 2nd to 4th.

ASSISTANT: Sure, could you please share me with your airport codes of journey?

USER: My airport codes are DFW and LAX.

ASSISTANT: May I know your name please?

USER: I am Paul Smith.

ASSISTANT: Are you looking for any other help from my side please?

USER: Yes, I need a lay off in my journey.

ASSISTANT: Please wait for a mean while.

USER: Sure, take your time.

ASSISTANT: Sorry Smith, there is no flight found as per your travelling details.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome.