You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to change my recent reservation as my plans for holidays plan got changed, can you please help me with that?

ASSISTANT: Let me know your name.

USER: I am Janet Martinez.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.