You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, I will help you with that. Can I have the name on which you reserved earlier?

USER: Myself Samantha Thomas.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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

USER: No problem, thanks for checking.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.