You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please change my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I am here to help you.

USER: Thanks for that.

ASSISTANT: May I know your name?

USER: Sure, my name is Ashley Hall.

ASSISTANT: There is no reservation found on your name.

USER: Oh! May be something went wrong while I was booking the ticket. Thank you anyways.

ASSISTANT: Thank you for choosing us.