You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mary Scott here.

ASSISTANT: How can I help you?

USER: Please help me out in changing my recent reserved ticket.

ASSISTANT: Mary Scott, I am glad to help you. May I request you to please allow me a moment to check with the status?

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, there is no active reservation found under your name to make changes.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching our agency.