You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Jacob Barker. Due to sudden health issue, I have not able to travel on those dates, so can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, please wait a moment I will check your details and get back to you.

USER: Sure, take your own time.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Oh! Might be my brother has canceled my reservation. Thank you for your assistance.

ASSISTANT: Thank you for connecting with us, have a nice day.