You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Owing to an emergency, I need to cancel my reservation. Can you help me with cancelling my tickets?

ASSISTANT: Sure, could you please mention your name to proceed further?

USER: I have made my previous reservation with the name Sarah Perez.

ASSISTANT: Ok, please hold a moment, let me check your reservation with us and let you know.

USER: Ok, I will be waiting.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with provided name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for connecting with us, have a great day ahead.