You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am unable to go for the trip because my father is facing some health issues, so I should take care of him. I need to cancel my ticket. Can you help me?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Dorothy Johnson.

ASSISTANT: Please be on hold. There is no reservation found active on your name, Johnson.

USER: It's ok, thank you for searching.

ASSISTANT: Thank you for choosing us.