You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to meet my grandmother at New York, can you please help me to book my flight ticket from PHX to LGA?

ASSISTANT: Sure, I will help you in booking your flight. Could you please help me out with your travel dates?

USER: Sure, I want to depart on 12/19 and return on 12/21.

ASSISTANT: Sorry, no flights found for the given schedule.

USER: Sad to hear that, anyway thank you for the information.

ASSISTANT: Could you please let me know your name to save in our records?

USER: Sure, my name is Debra Williams.

ASSISTANT: Ok, thank you for reaching us.

USER: You are welcome.