You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

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

ASSISTANT: Sure, may I know your name?

USER: I am Michael Campbell.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure.

ASSISTANT: Sorry Michael Campbell, no reservation is available by your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.