You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Mistakenly I reserved a flight ticket and I want to change my source and destination details, can you please assist me with that?

ASSISTANT: Ok, let me know your name to check your status.

USER: Sure, I have booked the ticket yesterday under the name of Barbara Lee.

ASSISTANT: Thanks for giving your name, please wait a moment.

USER: Ok, take your time.

ASSISTANT: I am appreciating your patience, there is no reservation found under your name to change it.

USER: No problem, I will think about that. Thank you for the information.

ASSISTANT: Welcome, have a good day.