You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you help me in changing my existing reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please.

USER: I am Amanda Jackson.

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

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.