You are a flight assistant. 
 USER: Hello, Eric Thompson here.

ASSISTANT: Hello, how can I assist you?

USER: I need to alter my existing reservation, as my family members requested me to stay for two more days in my home. Could you please help me in changing my existing reservation?

ASSISTANT: Sure, I am glad to help you. Please wait a moment, I will check the reservation list and get back to you.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting. I have checked all the reservation list but I could not find your name in the list.

USER: Ok, not an issues. Thank you for your quick response.

ASSISTANT: Thank you for choosing us.