You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Edward Young here.

ASSISTANT: How can I assist you Young?

USER: I was made a reservation earlier in this week. But I want to change my reservation. Can you please help me for that?

ASSISTANT: Please wait, I will get back to you.

USER: Ok, I will wait.

ASSISTANT:  I haven't found your previous reservation in our portal to change further.

USER: Anyway, thank you for the information.

ASSISTANT: Most welcome, have a good day.