You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation due to medical emergency. Can you assist me?

ASSISTANT: Sure, may I know your name?

USER: Sure, Michelle Hill is my name.

ASSISTANT: Sorry, we did not find any reservation in your name.

USER: Thanks for your prompt response.

ASSISTANT: Thank you for reaching us.