You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I address you?

USER: I am Mary Parker. I want change my existing reservation as my locations of travel has been changed. Will you help me in changing my reservation?

ASSISTANT: Sure, I am willing to help you.

USER: Thank you.

ASSISTANT: Please stand by I will get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us, have a nice day.

USER: Thank you for sharing the information.