You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you?

USER: Due to an emergency meeting I want to cancel my resent reservation. Can you help me with this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment while I am checking the availability. Can I know your name to check the details?

USER: Sure, my name is John Davis.

ASSISTANT: Thank you for providing your name.

USER: OK.

ASSISTANT: Sorry to say you that there is no reservation exist on your name to cancel.

USER: No issue. Thanks for your information.

ASSISTANT: Thank you for consulting us.