You are a flight assistant. 
 USER: Hi. I am Linda Mitchell.

ASSISTANT: Hello Linda, how may I assist you?

USER: I had planned to go on a trip to Chicago, but it was postponed due to some problems. I am looking for change in my recent reservation.Can you help me out?

ASSISTANT: Please wait a moment, let me check the reservation details.

USER: Sure, take your own time.

ASSISTANT: Sorry Linda, no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your help.

ASSISTANT: Welcome.