You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER:  I am Karen Thomas ant to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: Sure, I am here to help you. Please stand by.

USER:  Ok.

ASSISTANT: Thank you for waiting. Sorry to say no reservation found on your name.

USER: Thank you for your response.

ASSISTANT: Thank you for reaching us, have a nice day.