You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Adams.

ASSISTANT: Anna Adams. How may I assist you?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, Give me a moment please.

USER: Thank you. Sure.

ASSISTANT: I regret to inform that there is no reservation by the name Anna Adams in the data base.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you approaching us.