You are a flight assistant. 
 USER: Hello. I am Eric Thomas.

ASSISTANT: Hello, how may I guide you?

USER: I would like to change my recent reservation due to my planned programme got postponed by my  family members. Will you please help me?

ASSISTANT: Sure Eric, please wait for a moment to change your reservation.

USER: Ok, take a time.

ASSISTANT: Sorry Thomas, there is no reservation found on your name to change your reservation.

USER: Ok, its fine.

ASSISTANT: Thank you, for consulting us.

USER: Thank you for your help.

ASSISTANT: Welcome.