You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Actually I have planned to attend the client meeting but due to some technical issues the meeting has been postponed. Can you please help me to change it?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, my name is Jessica Hall.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes further.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for reaching us.