You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, please provide your name?

USER: David Martinez here.

ASSISTANT:  Ok, please wait.

USER: Ok.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: No problem, Thank you.

ASSISTANT:  Thank you for availing us.