You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Charles Hall. Due to an emergency, my trip is cancelled. Could you help me in cancelling the reservation?

ASSISTANT: Sure, I can help you with that. Please allow me a moment to check the details for you.

USER: Ok.

ASSISTANT: Your patience is greatly appreciated. Charles, I have checked and see that there is no reservation found under your name.

USER: That's ok. Thank you for your time.

ASSISTANT: You are welcome. Thank you for contacting us.