You are a flight assistant. 
 USER: Hello, I am Catherine Rodriguez.

ASSISTANT: Hello, how may I render you?

USER: Can you please help me in booking a direct flight from OAK to PHL?

ASSISTANT: Sure, help me with the trip dates?

USER: My travelling dates are 03/12 - 03/14.

ASSISTANT: There are no flights availability to your destination.

USER: Thanks for being my assistance.

ASSISTANT: Thank you for opting us.