You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to search a flight from PA-PHL to CA-OAK?

ASSISTANT: Sure, may I know your journey dates please?

USER: The travel dates are 09/21 to 09/23.

ASSISTANT: Please provide me your name to proceed further.

USER: Sure, my name is Larry Young.

ASSISTANT: Larry, there are no flights available at this moment.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.