You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you today?

USER: Due to some health issues I could not catch my flight at right time, so I need some help to change my existing reservation.

ASSISTANT: Sure. Can you please provide me your name?

USER: Myself Rachel Anderson.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no active reservation found on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.