You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Pamela Wilson.

ASSISTANT: How may I help you?

USER: Due to emergency, I want to cancel my reservation. Can you help me with that?

ASSISTANT:  Pamela, actually there is no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Ok, thank you for choosing us.