You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Samantha Mitchell here.

ASSISTANT: How may I assist you today?

USER: Can you change my recent reservation to new locations?

ASSISTANT: Sure. Please wait, I will revert to you.

USER: Thank you, I will wait for your response.

ASSISTANT: Thanks for your time.

USER: It's ok.

ASSISTANT: No reservation is existed earlier to proceed further.

USER: No problem, thanks for checking.

ASSISTANT: Thanks for availing us, Have a nice day.