You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, I can help with that one.

USER: Thank you.

ASSISTANT: Can I have your name for checking purpose?

USER: Ok, I am Shirley Adams.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no reservation found for the user name in our data base.

USER: That's fine, not an issue. Thank you for your valuable information.

ASSISTANT: You are welcome and have a nice day.