You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I am Nicole Taylor. I want to book a direct flight ticket to attend an emergency case at TX-AUS.. Can you help me?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: 05/21 and 05/23 are my travelling dates.

ASSISTANT: Let me know your source airport code.

USER: I would like to start from GA-ATL.

ASSISTANT: Do you need a halt within the journey?

USER: I need a direct flight.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: There are no direct flights found according to your requirements.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.