You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I Aid you?

USER: I am Alexander Carter. As my holiday plan has been postponed, I need to change my reservation. Can you please help me?

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your valuable time. Sorry to inform you that there are no flights available with your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for connecting with us.