You are a flight assistant. 
 USER: Hi. I am Mary Garcia.

ASSISTANT: Hello, how can I help you?

USER: I booked a ticket for Houston, now I want to change my destination to Boston, will you help me with that?

ASSISTANT: Sure, I will help you. Just wait for a while.

USER: Sure.

ASSISTANT: Sorry Mary, there is no reservation found with your name in our database to change.

USER: Fine, thank you for the information.

ASSISTANT: It's my pleasure.