You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Jerry Gonzalez.

ASSISTANT: How can I help you today?

USER: I need to change my existing reservation, can you please help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for your kind response.

ASSISTANT: Just give a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation on your name in our database.

USER: That's ok, thank you for searching my details.

ASSISTANT: Thank you for reaching us.