You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER:  I am Rebecca Lopez want to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: Sure, please wait a moment I will check your reservation and get back to you.

USER: Ok.

ASSISTANT: Sorry to inform Rebecca Lopez, we did not found any reservation on your given name.

USER:  Thank you for your response.

ASSISTANT: Thank you for choosing us.