You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I'm Alexander Phillips.

ASSISTANT: Phillips, how may I assist you today?

USER: Due to severe health issue, I want to quit my trip. Can you please cancel my recent reservation?

ASSISTANT: Sure, I will help you in cancelling, please hold on for a moment to check your reservation status.

USER: Sure, take your time.

ASSISTANT: Phillips, I did not find any reservation with your name in my database.

USER: That's ok, may be I have done a wrong booking. Thank you for your time anyways.

ASSISTANT: You are welcome.