You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How can I amend you today?

USER: As there is a sudden change in climate at my destination, I want to change my existing reservation. Can you help me in changing my reservation?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Let me know your name for checking the reservation.

USER: My name is Andrew Walker.

ASSISTANT: Thanks for sharing your name. Give a minute, I will check the previous list and let you know the details of it.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found on your name in our database.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for opting us.