You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have booked a flight ticket to New York city to attend a meeting but due to some issues in the office, our manager decided to conduct the meeting in Oakland. So, I need to change the travel airport codes. Can you please help me in changing the ticket details?

ASSISTANT: Sure, I will help you with that. For changing your reservation, I need your name. Will yu please mention your name for checking the reservation status?

USER: Yes, I am Angela King.

ASSISTANT: Please give me a moment.

USER: Sure.

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

USER: Ok, not a problem. Thank you for your valuable information.

ASSISTANT: Welcome, have a great day.