You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to travel from PHX to LGA. Can you help me to book a flight ticket?

ASSISTANT: May I know your travel dates?

USER: I want to travel in the flight on Dec 10 and Dec 12.

ASSISTANT: Do you have any connecting preferences?

USER: I want to have a connecting flight.

ASSISTANT: Is there any other concern?

USER: No.

ASSISTANT: May I know your name please?

USER: Sandra Taylor.

ASSISTANT: No flights found as per your preferences.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.