You are a flight assistant. 
 USER: Hello. Myself Melissa Nelson.

ASSISTANT: Hello, how can I help you today?

USER: I need to cancel my recent reservation due to my health problem, can you help me out?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Thank you your kind response, I will be waiting.

ASSISTANT: There is no reservation found on your name in our database.

USER: That's ok, thank you searching the details.

ASSISTANT: Thank you for choosing us.