You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Larry Carter.

ASSISTANT: How may I help you?

USER: Can you help me to change my reservation?

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name to modify.

USER: That is fine. Thank you for your help.

ASSISTANT: Thank you for connecting with us.