You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Green.

ASSISTANT: How can I aid you Jennifer?

USER: I have already done the reservation , but I am unable to travel on that date due to some office work. Can you cancel my ticket?

ASSISTANT: Please give me a moment, let me check.

USER: Sure.

ASSISTANT: Sorry, no reservation found under your name.

USER: It's alright, no problem. Thank you for searching and quick response from your side.

ASSISTANT: Thank you, have a great day.