You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for the day?

USER: Can you please change my exiting reservation?

ASSISTANT: Sure, please share your name?

USER: My name is Paul Rodriguez.

ASSISTANT: Ok, let me check with our previous reservation.

USER: Sure.

ASSISTANT: There is no reservation found under your name, thank you for reaching our agency.

USER: Thanks for your service.

ASSISTANT: Have a great afternoon Paul Rodriguez.