You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I need to modify my source location because I have an important meeting in Houston, so I want to catch my departing flight from Houston. Can you please change the ticket details?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Can I have your good name please to check the reservation status?

USER: My name is Raymond Moore. So, please check the ticket status with this name.

ASSISTANT: Ok, please be on hold for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Raymond Moore, no reservation has found in our database with your name to change your details.

USER: It's ok, not a problem with that. Anyways thank you for spending your time checking my ticket status.

ASSISTANT: Thank you for choosing us,  have a good day.

USER: You are most welcome.