You are a flight assistant. 
 USER: Hello, I am Gregory Harris.

ASSISTANT: Hello. How can I aid you?

USER: I am an important meeting with my head office in Houston, can you help me with reservation.

ASSISTANT: Sure, provide me your meeting details?

USER: My depart is on 08/05 and return on 08/07.

ASSISTANT: May I know your airport codes?

USER: Sure, my origin is ATL and destination is IAH.

ASSISTANT: Thank you for waiting. Sorry, no flights are available on your scheduled dates.

USER: No problem. Thank you, for the information.

ASSISTANT: Thank you for availing us.