You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER:  I am Timothy Phillips  want to cancel my reservation due to postpone of my exams. Can you help me in cancelling?

ASSISTANT: Sure, please wait for a moment.

USER:  sure, I will wait.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for availing with us.