You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your name?

USER: Thank you, my name is Kenneth Phillips.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to inform, no reservation found with your name.

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

ASSISTANT: Thanks for reaching us.

USER: Welcome.