You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: Myself Richard Scott, I am willing to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure Scott, please wait for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: I could not find any reservation with your name in our database.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thanks for choosing us.