You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you today?

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

ASSISTANT: Sure, I will help you to cancel your reservation. May I know your name?

USER: Myself Sandra Rodriguez.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, thank you for opting us.