You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I reserved a seat on my Virginia Walker, to attend my nephew's marriage. But it was postponed to other day. So, can you help me in changing the reservation?

ASSISTANT: Sure, we are glad to help you. Please provide your good name to check the reservation in the reservation list.

USER: I have already mentioned it above.

ASSISTANT: Sorry for the inconvenience. Please wait for a while.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Ok.

ASSISTANT: Thank you for reaching us. Have a good day.

USER: Thank you for assisting me.