You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: My friends cancelled the plan unfortunately, so please help me to cancel my reservation. Can you help me with that?

ASSISTANT: Sure, may I know your name to proceed further?

USER: My name is Sarah Rodriguez.

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: I am really sorry for to tell you, I cannot find any reservation with your requirements.

USER: That's ok, not an issue.

ASSISTANT: Thanks for contacting us Sarah.

USER: Thank you for your service.

ASSISTANT: It's my pleasure.