You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Shirley Davis here.

ASSISTANT: How can I help you?

USER: I want to cancel my recent reservation. Can you help me in that?

ASSISTANT: Sure, let me check your reservation details.

USER: Ok.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.