You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Melissa Robinson. Can you help me to amend my reservation which is existing on my name?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Ok, thank you.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: That's ok, thank you for assisting me.

ASSISTANT: Welcome, have a nice day. Thank you for connecting us.