You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Gregory Lopez here. Due to heavy rains in my existing location, I want to cancel my reservation. Could you help me in cancellation of ticket?

ASSISTANT: Sure, I am here to help you out.

USER: Thanks.

ASSISTANT: We haven't found any reservation under your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.