You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Elizabeth Brown.

ASSISTANT: How may I assist you at this moment?

USER: Can you change my existing reservation to new locations?

ASSISTANT: Elizabeth, please wait for a minute to check the reservation details.

USER: Sure, take your time.

ASSISTANT: Elizabeth Brown with your name there is no reservation in our database.

USER: It's ok, thanks for checking my status.

ASSISTANT: It's my pleasure.