You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Due to health issues, I am unable to travel for the trip. So, I decided to cancel my ticket. Can you please help me?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: My name is Dorothy Brown.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your reply.

ASSISTANT: Dorothy, there is no reservation found under your name.

USER: It's ok, anyway's thank you for checking.

ASSISTANT: Thank you for contacting us.