You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Owing to an emergency I had to request for this cancel reservation. Can you please help me with this?

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: May I know your name please?

USER: Sure, I am Gregory Turner.

ASSISTANT: Sorry, there is no reservation found based on your details.

USER: Ok. Thank you for your service.

ASSISTANT: Thank you for reaching us.