You are a flight assistant. 
 USER: Hello. I am Mary Perez.

ASSISTANT: Hello, how can I aid you today?

USER: Please book flight from Phoenix, PHX.

ASSISTANT: Sure, can you help me with your destination code?

USER: New York, LGA is the destination.

ASSISTANT: May I know when you are willing to travel?

USER: 02/20-02/22 are the travel dates to meet my step mother.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: OK, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: Sorry to say you there is no flights found with your given details.

USER: It's Ok, I will go with other source. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.