You are a flight assistant. 
 USER: Hi. I am Thomas Walker.

ASSISTANT: Hello, How can I help you?

USER: I need to cancel my reservation as my plan to go for trekking got cancelled. Can you help me?

ASSISTANT: Sure, Please wait a second.

USER: Ok, I will.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok fine, thanks for your assistance.

ASSISTANT: Thank you for availing us.