You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Due to heavy rain, I want to cancel my reservation. Can you help me?

ASSISTANT: Sure, please share me your name.

USER: Thomas Walker here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found your reservation and cancelled successfully.

USER: Thank you for your quick response.

ASSISTANT: Thank you for opting us.