You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jack Allen here.

ASSISTANT: Allen, how can I assist you?

USER: I want to cancel my ticket as I am sick.

ASSISTANT: Sure, I am here to help you. Please wait for a while, I will check your reservation status and let you know.

USER: Sure.

ASSISTANT: Allen, I did not find any reservation on your name in our database.

USER: No problem, thank you.

ASSISTANT: You are welcome and thank you for contacting us.