You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Michael Walker here.

ASSISTANT: How may I guide you?

USER: Can you please help me in cancelling my recent reservation? As my planned trip has been cancelled.

ASSISTANT: Michael Walker, I am here to help you for this. Let me check your reservation status in our database.

USER: Sure, take your own time.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you very much for approaching our agency.