You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I want to cancel my recent reservation due to bad health conditions. Can you help me in doing that?

ASSISTANT: Please let me know your name.

USER: I am Ryan Lopez.

ASSISTANT: I regret, no reservation found by name Ryan Lopez.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks. Have a nice day!.