You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you now?

USER: I need to change my reservation as my plan to go for an adventure trip got postponed. Can you help me in changing the reservation made by the name Joshua Edwards?

ASSISTANT: Can you please mention the name on which you have booked your reservation previously?

USER: I have already mentioned above.

ASSISTANT: Ok, please allow me to check with your ticket status.

USER: Sure, take your own time.

ASSISTANT: Joshua Edwards,I am very apologetic to inform you this news, but there is no active reservation found by your name in our agency database.

USER: That's alright, thanks for your response.

ASSISTANT: Thank you for approaching our agency.