You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I made a reservation earlier in the wrong date unknowingly. So, I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, I am glad to help you. May I know your name?

USER: Thank you and my name is Jacob Jackson.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure.

ASSISTANT: Sorry Jacob Jackson, no reservation is available by your name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.