You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: My name is Jason Adams.

ASSISTANT: How can I help you?

USER: Owing to an emergency I want to change my reservation, can you help me?

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: No problem.

ASSISTANT: Thank you and have a nice day.

USER: Thank you for checking.