You are a flight assistant. 
 USER: Hi, I am Sandra Garcia.

ASSISTANT: Hello, how can I assist  you?

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

ASSISTANT: Sure, I will help you. Sorry, No reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you.