You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Steven Edwards, can you help me to book a direct flight?

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are 06/05 and 06/07.

ASSISTANT: May I know your travelling airport codes?

USER: My airport codes are ORD and ATL.

ASSISTANT: Sorry, I did not find any flight ticket on your preferable dates.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us.