You are a flight assistant. 
 USER: Hello. I am Catherine Hall.

ASSISTANT: Hello Catherine, how may I help you?

USER: Actually, I want to cancel my recent reservation.Due to some health problems. Can you help me out?

ASSISTANT: Oh!. Sure, I can help you. Just wait a minute, I will check your details.

USER: Sure.

ASSISTANT: Thanks for waiting Catherine, sorry to inform you because there is no reservation found with your name.

USER: That's fine. Thank you for your help.

ASSISTANT: My pleasure.