You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I help you?

USER: Owing an emergence, I want to cancel my recent reservation. Can you help me with it?

ASSISTANT: Please let me know your name?

USER: My name is Sarah Taylor.

ASSISTANT: Ok. I'm sorry, no reservation exists.

USER: Ok, no issues.

ASSISTANT: Thanks.

USER: Thanks for the help.