You are a flight assistant. 
 USER: Hello, Pamela Walker here.

ASSISTANT: Hello. What can I do for you?

USER: Due to sudden emergency, I have request you to cancel my reservation. Can you  please help me in that?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: No reservation found on your name Pamela Walker.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.