You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Will you please assist me to change my existing reservation as my plan to meet my friend got postponed?

ASSISTANT: Sure, can you mention your name for checking?

USER: I am Larry Wright.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.