You are a flight assistant. 
 USER: Hello. Helen Wilson is my name.

ASSISTANT: Hello, how can I help you?

USER: Due to an emergency, I want to cancel my recent reservation. Can you assist me with that?

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found with your name.

USER: Ok, no problem. Thanks for your quick response.

ASSISTANT: Thanks for choosing us.