You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: I am Emily Collins.

ASSISTANT: Yes, Emily how can I serve you for today?

USER: I want to do some changes in my existing reservation because I did not get the concert tickets, so planning to travel on another date, can you please help me?

ASSISTANT: Yes, sure. Emily Collins I couldn't find any reservation on your name to change in our database.

USER: That's fine.

ASSISTANT: Do you have any other requirements from our service?

USER: No.

ASSISTANT: Thank you for choosing our service. Hope you have a great day ahead.

USER: Thank you.