You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Alexander Edwards. Due to sudden change in my trip I want to change my reservation. Can you do it for me?

ASSISTANT: Sure, please give me a moment to check the database.

USER: Sure, take your time.

ASSISTANT: Sorry Edwards, there is no reservation available on your name in our records.

USER: It's ok, thank you.

ASSISTANT: You are most welcome.