You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Margaret Wright, I booked a ticket to Charlotte, due to some urgent work I have to replan my journey,  can you change my reservation?

ASSISTANT: Sure, I will do it for you. Please stand by I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry to say no flights found with your details.

USER: Ok, thanks for the information.

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