You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in changing my flight ticket from  one my destination place to another?

ASSISTANT: Sure, may I know your name?

USER: I have reserved my flight ticket with name Margaret Wright.

ASSISTANT: Sure, please wait. Let me check.

USER: Ok, sure.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: Ok, fine thank you for your information.

ASSISTANT: You are welcome and thank you for choosing us.

USER: Most welcome.