You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I would like to do some modifications in my existing reservation, can you help me in that?

ASSISTANT: Certainly, I can do that for you. Can you please provide me the name on which it was reserved formerly?

USER: Sure, the ticket has been reserved on the name Mary Baker.

ASSISTANT: Ok, let me check the current status and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, there is no reservation found active under the name you provided.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.