You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Raymond Lee.

ASSISTANT: Lee, how may I help you?

USER: My business meeting has been postponed. So, I would like to change my reservation. Can you please help me with that?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation is available by your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.