You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Brenda Brown. Can you please help me in changing my flight ticket booking that I am unable to travel on those dates?

ASSISTANT: Sure, please wait a moment, let me know reservation is there or not.

USER: Ok, I will for your response.

ASSISTANT: There is no reservation on your name.

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

ASSISTANT: Thank you so much for choosing us.