You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Susan Martinez. Can you help me with changing my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: Please wait for a while.

USER: Sure, I need a connecting flight.

ASSISTANT: Sorry no reservation found with your name in our database.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you  for choosing us.