You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Kathleen Nelson, can you help me searching flights from PHL to LGA?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are 05/18 and 05/20.

ASSISTANT: OK, please hold on for a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that I didn't find any flight on your route.

USER: Oh! Sad to hear, anyway I will complete my travel in another way. Thank you for your services.

ASSISTANT: Thank you for reaching us.