You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Elizabeth Smith here. Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Elizabeth Smith, there is no reservation on your name.

USER: Oh! I think my cousin might had cancelled my reservation. Anyway, thank you for the information.

ASSISTANT: Thank you.

USER: Welcome.