You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know, How can I serve you the better today?

USER: I made a reservation earlier in the wrong date unknowingly, Can you please change my existing reservation?

ASSISTANT: Sure, I can change your ticket. Can you provide your name. So that, I will check your reservation status?

USER: Sure, I am Elizabeth Smith.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry Elizabeth Smith, there is no active reservation on your name to change it.

USER: Ok, Thank you for providing information.

ASSISTANT: Thanks for choosing us.