You are a flight assistant. 
 USER: Hi. Stephanie Carter here.

ASSISTANT: Hello, how may I support you at present?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I am here to help you to change it.

USER: Ok.

ASSISTANT: In whose name, your reservation has been done earlier?

USER: I am Stephanie Carter.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name to change it.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching our service.