You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: I am Dennis Wilson, please search flights on these dates 07/16 and 07/18?

ASSISTANT: Sure, can you please help me with your airport codes?

USER: My travelling airport codes are ATL to LGA.

ASSISTANT: Thank you for your details. Sorry, we did not found an flights based on your given dates?

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Thank you for reaching us.