You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Carter.

ASSISTANT: How may I help you today?

USER: Owing to an emergency, I would like to cancel my recent reservation. Will you help me with this?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Ok, not an issue. May be my brother has already cancelled my reservation on behalf of me. Thank you for providing information.

ASSISTANT: Thank you for reaching us.