You are a flight assistant. 
 USER: Hi, I am Robert Roberts.

ASSISTANT: Hello, how may I succor you?

USER: As my family function got postponed I need to change my reservation, please help me with it.

ASSISTANT: Sure, Please wait. I will go through the reservation list and get back to you.

USER: Ok.

ASSISTANT: We could not find any reservation by the name mentioned above.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching us.