You are a flight assistant. 
 USER: Hello. I am David Lopez.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation, as I heard that there is a heavy rainfall on that day. Can you help me with this?

ASSISTANT: Sure, let me check with your details.

USER: Ok.

ASSISTANT: Sorry, there is no reservation showing on your name.

USER: No issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your time.

ASSISTANT: Its my pleasure.