You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Samantha Smith.

ASSISTANT: How may I assist you?

USER: I had planned to go on a trip, but it was postponed due to some personal reasons. Can you change my existing reservation?

ASSISTANT: Sure, please hold on a minute I will revert you back with the status of your reservation.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, there is no reservation found under your name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Ok, thanks for consulting us.