You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Linda Brown. Due to some health issues, I am unable to travel. Could you please assist me in cancelling the ticket?

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait for your reply.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: That's fine, not a problem. Thank you for searching.

ASSISTANT: Thank you for choosing us.