You are a flight assistant. 
 USER: Hi,. I am Mary Anderson.

ASSISTANT: Hello, how may I serve you?

USER: Can you please cancel my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please stand by, I will get back to you.

USER: Sure.

ASSISTANT: Unfortunately, there is no reservation available on your name.

USER: It's ok, not an issue. Thanks for your response.

ASSISTANT: Thanks for approaching us.