You are a flight assistant. 
 USER: Hello, I'm Thomas Anderson.

ASSISTANT: Hello. How may I assist you?

USER: Due to an emergency, I would like to cancel my recent reservation. Can you help me out with this please?

ASSISTANT: Sure, wait for a minute.

USER: Ok.

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

USER: That's ok. Thank you.

ASSISTANT: Do you want any other help?

USER: No thanks.

ASSISTANT: Ok, thank you for contacting us.

USER: Welcome.