You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Karen Clark, can you help  me to cancel my existing reservation?

ASSISTANT: Sure, I am here to help you. Let me check your reservation status.

USER: Ok, I will wait.

ASSISTANT: Clark, I have not found any reservation under your name in our database.

USER: That's ok, not a problem. Thank you for searching.

ASSISTANT: You are welcome and thank you for contacting us.