You are a flight assistant. 
 USER: Hi. I am Rachel Robinson.

ASSISTANT: Hello, how may I assist you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for approaching us.