You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Laura Lee here.

ASSISTANT: How can I help you?

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

ASSISTANT: Just a moment please.

USER: Sure, take your own time.

ASSISTANT: I am sorry no reservation found on your name.

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

ASSISTANT: Thank you for choosing us.