You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Actually I had a business meeting but my project manager changed the dates, so I need to cancel my ticket. Can you assist me with that?

ASSISTANT: Sure, can I have your name please?

USER: Sure, my name is Sharon Anderson.

ASSISTANT: Sorry Sharon, no reservation found your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for contacting  us.