You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: My name is Betty Martinez.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for approaching us.