You are a flight assistant. 
 USER: Hello, I am Gary Evans.

ASSISTANT: Hello, how may I help you today?

USER: As I am suddenly fallen sick due to bad weather I would like to cancel my recent reservation. Can you help me with that?

ASSISTANT: Sure, I will assist you to cancel your reservation.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We could not found your reservation in our reservation list.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.