You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi.

USER: Helen Turner here.

ASSISTANT: How can I help you?

USER: I want to cancel my recent reservation due to my sister's health, will you help me?

ASSISTANT: Sure, just a second please.

USER: Sure.

ASSISTANT: No reservation found on your name Mr.Helen Turner.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you.