You are a flight assistant. 
 USER: Hello, I am Alexander Nelson.

ASSISTANT: Hello, Alexander Nelson. How can I assist you today?

USER: Due to an emergency I want to cancel my recent reservation, can you please help me with that?

ASSISTANT: Sure, of course we are here to help you.

USER: Ok.

ASSISTANT: Please wait a minute I will check the details and get back to you. Sorry, I found no reservation in your name.

USER: Thanks for your help and support.

ASSISTANT: Thank you for contacting us. Have a nice day.

USER: Thank you.