You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to cancel my ticket due to my health issue, can you help me?

ASSISTANT: May I know your name please to check the status of your reservation?

USER: I am Frank Collins.

ASSISTANT: Thank you. Please stay online for a while, I will check your reservation status and let you know.

USER: Sure.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.