You are a flight assistant. 
 USER: Hi. This is Linda Jones, looking for your help.

ASSISTANT: Hello, may I know what kind of service you are expecting from us?

USER: I need your assistance in changing my ticket, which is reserved earlier. Can you help me in that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for responding to my request.

ASSISTANT: Please wait for a while, I check the reservation status and get back to you.

USER: Sure, make it as fast as you can.

ASSISTANT: Thanks for giving your valuable time. I have checked in the reservation list to change your name but we could not find any reservation in your name.

USER: Ok, no problem. I think there is some problem at the time of reservation. Thanks for your excellent service.

ASSISTANT: Thank you for opting us, we hope to serve you again.