You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Brandon Adams, I have done my flight ticket booking last week but due to raining.I like to cancel my booking. Can you help me about it?

ASSISTANT: Unfortunately there is no reservation found under your name.

USER: Ok, that's fine.Thank you for your services.

ASSISTANT: Welcome, have a great day.