You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, I will help you. Can you please tell me your name please?

USER: Sure, my name is Sandra Jones.

ASSISTANT: Jones, there is no reservation with your name to cancel further.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.