You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Owing to an emergency, I want to cancel my reservation. Can you please help me with that?

ASSISTANT: May I know your name to check your reservation?

USER: I am Donna Lewis.

ASSISTANT: Ok, please wait.

USER: Ok.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for choosing us.