You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Karen Lopez. Can you please help me to reserve a flight ticket from Atlanta to Houston?

ASSISTANT: Sure, please share your travelling dates.

USER: Thank you. My travel dates are July 01 and July 03.

ASSISTANT: Sure, which airport codes do you want to travel?

USER: The source and destination airport codes are ATL and IAH.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for a direct flight.

ASSISTANT: Thank you, there are no flights found.

USER: It's ok, not a problem with that. Anyways thank you for your time.