You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Helen Lee. I am planning to travel from ATL to PHL, can you help in booking a flight?

ASSISTANT: Sure, please provide your planned travel dates.

USER: My travelling dates are 01/13 to 01/15.

ASSISTANT: Please hold on a moment, Lee.

USER: Ok.

ASSISTANT: Lee, no flights has been found on your planned travel dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.