You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I be of your help?

USER: My friend marriage was postponed so I need to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, may I know your good name please?

USER: I am Ronald Green.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for being wait. Unfortunately there is no reservation available with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us.

USER: Thanks for your help.