You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello. How may I help you?

USER: Myself Rachel Taylor, can you help me to change the reservation which I have done a week ago as the interview had been postponed to some other dates?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok, please take your time I will wait.

ASSISTANT: Sorry to say, no reservation found on your name. Thank you for reaching us, have a nice day.

USER: That is ok, thank you for the information and the expeditious service.