You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Myself Jeffrey Rodriguez. Due to some urgent meeting, I am going to change my reservation. Can you please help me for this?

ASSISTANT: Sure, I will help you in changing the ticket,.

USER: Thank you very much for quick access.

ASSISTANT: Sorry, there are no reservations found.

USER: Not a big problem, anyway thank you very much for your information.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.