You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Edward Thompson here.

ASSISTANT: How may I help you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Yes, I am gleeful to assist you wit that. Can you please give me sometime to check your previous ticket status?

USER: Ok, I will wait.

ASSISTANT: Sorry to tell you that, I have not found any active reservation under your name to change the details.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome. Thank you for reaching us. Have a nice day.