You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Myself Shirley Martin. As there are some changes in my trip,I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, wait for a minute.

USER: Ok.

ASSISTANT: Sorry Martin, no reservation found on your name.

USER: No problem. Thank you for your time.

ASSISTANT: Do you need any other help?

USER: No.

ASSISTANT: Ok, thank you for reaching us.