You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Emma Campbell here.

ASSISTANT: Yes, Campbell.

USER: I want to cancel my recent reservation due to my health issue, will you help me over that?

ASSISTANT: Sure, please wait a moment let me check your previous details reservation. Sorry, no reservation found on your details. Thank you for contacting us.

USER: Ok, not an issue. Thank you for your response.

ASSISTANT: Welcome.