You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Michael Green here.

ASSISTANT: How can I help you?

USER: I want to cancel my recent reservation due to postpone of my exams. Can you help me in that?

ASSISTANT: Please wait a moment to check the reservation status.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for your service.