You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Debra Perez.

ASSISTANT: How can I assist you?

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

ASSISTANT: Sure, I'll help you with that. Please be on hold.

USER: Sure, I will wait for your response.

ASSISTANT: I have found your reservation, shall I cancel it for sure?

USER: Please go ahead with my cancellation of reservation.

ASSISTANT: Your ticket has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.