You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Could you please book me a ticket?

ASSISTANT: Sure,can you please provide your travelling dates?

USER: My departure date is 01/03 and my return date is 01/05.

ASSISTANT: Could please provide your travelling locations?

USER: I would like travel from TX- AUS to TX- IAH.

ASSISTANT: May I know your name for further process?

USER: My name is Joseph Rodriguez.

ASSISTANT: Sorry,as per your requested dates there is no flight available.

USER: That's really sad. Anyways thank you for the information.

ASSISTANT: Your welcome.