You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you today?

USER: I want to cancel my recent reservation due to some health problem.

ASSISTANT: Sure , we are here to help you.

USER: Can you help me with that?

ASSISTANT: Can you please provide your name to check your reservation status?

USER: Charles Roberts here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any reservation with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.