You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Matthew Rodriguez.

ASSISTANT: How may I aid you at this moment?

USER: I want to change my recent reservation which was reserved in the last week. Would it be possible to change it?

ASSISTANT: Sure, please wait for few minutes.

USER: Ok, take your time.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.