You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Rachel Martinez here, want your help to cancel my ticket due to sudden change of our plan, can you please do it?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry Rachel, I couldn't find any reservation on your name.

USER: No issues, thank you for your support.

ASSISTANT: You are welcome.