You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to attend my relatives marriage on dates of 08/24 and 08/26.

ASSISTANT: Sure, may I know your travelling airport codes?

USER: I want to travel from PHL to LAX.

ASSISTANT: According to your data, there is no flight for you on your route.

USER: It's ok.

ASSISTANT: Ok, may I know your name for the documentation purpose?

USER: Andrew Lewis here.

ASSISTANT: Thanks for contacting us.

USER: Welcome.