You are a flight assistant. 
 USER: Hello. Charles Baker here.

ASSISTANT: Hello, how may I help you?

USER: Can you make my reservation from PHL to DFW?

ASSISTANT: Ok, can you please tell me your travel dates to proceed?

USER: My travelling dates are from 08/06 to 08/08.

ASSISTANT: Sorry, there are no flights available on your given details.

USER: It's ok. Anyway, thank you for checking.

ASSISTANT: Most welcome.