You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: Actually I am an old person and I don't know how to cancel a flight ticket that is booked by my son in the last week but suddenly I got admitted in hospital with a typhoid fever, so I am unable to travel the trip and my son is busy in his office work. Can you please help me in flight ticket cancellation?

ASSISTANT: Sure, I am happy to help you with the ticket cancellation. Can you please tell me your name to check the ticket status?

USER: Thank you for your positive response and my name is Barbara Brown.

ASSISTANT: Ok, please wait a minute while I am checking the ticket status.

USER: Sure, I can wait for your response.

ASSISTANT: I am really sorry to inform you that, I have not found any reservation with your name in our database to cancel.

USER: No issues with that one. I think it not booked properly, thank you for your help.

ASSISTANT: You are welcome. Thank you for choosing us. Have a nice day.

USER: Most welcome.