You are a flight assistant. 
 USER: Hi, I am David Thompson.

ASSISTANT: Hello, David Thompson. What can I do for you today?

USER: Due to heavy rainfall, I want to cancel my reservation. Can you please help me in cancellation?

ASSISTANT: Ok. Please wait a while, I will check your reservation availability.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: Ok, thanks for your response.

ASSISTANT: Thank you for connecting us.