You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I aid you?

USER: I am Robert Campbell. Can you please help me in booking a flight ticket from IAH to ATL?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are from Mar 12th to Mar 14th.

ASSISTANT: Do you have any specifications?

USER: I need to return in the afternoon. I want a stopover in between my journey.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.