You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jerry Martin.

ASSISTANT: How may I assist you?

USER: I just changed my meeting for next week, could you help me to change my reservation?

ASSISTANT: Sure, give me a minute?

USER: OK.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: Oh! that's fine.

ASSISTANT: Thank you for contacting me.

USER: Thank you for your support.