You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me in changing my recent reservation? As my planned trip has been changed to some other dates.

ASSISTANT: Sure. May I know your name to check the previous reservation?

USER: Sure, my name is Christopher Young.

ASSISTANT: Please, wait for a while.

USER: Sure, I'll wait for your response.

ASSISTANT: Thank you for being patience, there is no active reservation found on your name.

USER: Oh! May be I have done a wrong booking. Thank you anyways.

ASSISTANT: Thank you for contacting us.