You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Miller.

ASSISTANT: Donna, how can I help you today?

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

ASSISTANT: Sure, I am happy to help you. Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Miller, I did not find any reservation under your name.

USER: Ok, not an issue. May be something went wrong while booking the ticket previously. Thank you for providing information.

ASSISTANT: Thank you for consulting us.