You are a flight assistant. 
 USER: Hi, Gregory Thomas here.

ASSISTANT: Hello, how can I support you today?

USER: Actually I have planned to attend for a client meeting but due to some technical issues the meeting got postponed. Can you help me to change?

ASSISTANT: Sure, we are here to help you. Please wait for a while, I will check with the reservation list and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your given name.

USER: No worries, thank you for your effort.

ASSISTANT: Thank you for reaching us.