You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, welcome to flight booking agency. How can I guide you for today?

USER: I am George Parker, my exam got postponed to next week. Can you help me to change my reservation?

ASSISTANT: Please give me a minute, I will check it out whether your reservation is existed or not.

USER: Please check my details.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's fine, not an issue.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.

ASSISTANT: Have a great day.