You are a flight assistant. 
 USER: Hello. I am Jonathan Garcia.

ASSISTANT: Hello, how can I support you today?

USER: As my holiday trip has been postponed, I need to change my reservation. Can you please help me?

ASSISTANT: Sure, i will help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name in our database.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.