You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I was planning to change my holiday location to a cheaper destination within my budget. So, can you please help me with changing my existing reservation?

ASSISTANT: Can I know your name?

USER: My name is Melissa Miller.

ASSISTANT: Sorry, no reservation found by your name.

USER: Oh! That's fine. thank you for checking.

ASSISTANT: Thank you.

USER: Most welcome.