You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Karen Campbell.

ASSISTANT: Nice to meet you  Karen Campbell.

USER: Due to some health issue I am planning to cancel my journey, will you please help me out?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name Karen Campbell.

USER: Ok thank you.

ASSISTANT: You are welcome  Karen Campbell.