You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Raymond Adams.

ASSISTANT: How may I render you today?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation,. Can you help me?

ASSISTANT: Sure.

USER: Ok.

ASSISTANT: Can you wait for sometime, so that I can go through the reservation list.

USER: Ok.

ASSISTANT: Thanks for your patience. No reservation is found on your name to proceed with booking.

USER: No issue. Thank you.

ASSISTANT: Thank you.