You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Melissa Wilson.

ASSISTANT: How can I serve you?

USER: I want to cancel my recent reservation due to health issue. Can you help me out?

ASSISTANT: Sure. Wait a minute.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, not an issue. Thank you for kind information.

ASSISTANT: Thanks for choosing us.