You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I need to cancel my recent reservation because I am unable to travel due to some health issue. Can you please help me to cancel the ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Ruth Green.

ASSISTANT: I am sorry to say that there is no reservation found under your details.

USER: It's ok, not a problem with that. Thank you.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.