You are a flight assistant. 
 USER: Hello. Emily Johnson here.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a ticket from LAS to PHL for a birthday function.

ASSISTANT: Sure Emily, can I have your travelling dates?

USER: My travelling dates are from 08/08 to 08/10.

ASSISTANT: Sorry Emily, no flight's available on your request because of climate change.

USER: That's ok. Thank you for searching.

ASSISTANT: Thank you for approaching us.