You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want cancel my recent reservation due to my health issue, will you help me on that?

ASSISTANT: Sure, will you provide your name?

USER: Yes, myself Daniel Anderson.

ASSISTANT: Ok Daniel, your reservation is cancelled.

USER:  Ok, thank you for your help.

ASSISTANT: Thank you for reaching us.Have a nice day.