You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Thomas Thompson.

ASSISTANT: How can I help you Thomas?

USER: I need to cancel my reservation as my exams got postponed, can you please help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Thomas, no reservation found under your name.

USER: Ok, no problem.

ASSISTANT: It's my pleasure.

USER: Thank you.