You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Paul Jones here.

ASSISTANT: How may I help you?

USER: As my planned trip has been changed to some other dates, I need your help in doing some modifications in my recent reservation. Can you help me with that?

ASSISTANT: Sure, I am here to help. Please stand by, while I will check in the previous reservation list and get back to you.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: That's ok, may be I have done a wrong booking. Thank you anyways.

ASSISTANT: Thanks for your reaching us, have a nice day.