You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am trying to cancel the previous ticket because I am unable to travel due to some health issues. Can you please help me to cancel the ticket?

ASSISTANT: Sure, may I know your name?

USER: Thank you for your positive response. My name is Jeffrey Evans.

ASSISTANT: Ok, hold on a minute.

USER: Ok, take your time.

ASSISTANT: We found your reservation and it has been cancelled.

USER: That's great, thank you so much for your help in cancelling the ticket.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.