You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Lisa Jackson. Book a ticket from Las to HOU under 5000.

ASSISTANT:  May I know your return date?

USER: My return date is 03/02.

ASSISTANT:  Provide me your travel date?

USER: My start date is 02/29.

ASSISTANT:  Ok, please wait I will revert you.

USER: OK.

ASSISTANT:  Sorry, no flights area available on your travel dates.

USER: Ok, no problem. Thanks for the information.

ASSISTANT:  Thank you for availing us.