You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking the ticket from LGA to PHX? As I'm planning to visit my grandparents.

ASSISTANT: Sure, can you please share your travelling dates?

USER: My departure and return travel dates are 25th and 27th of Dec.

ASSISTANT: Do you have any connection limit?

USER: I just need a direct flight.

ASSISTANT: Any other requirements to be met?

USER: I want to depart in the evening time.

ASSISTANT: May I know your name?

USER: My name is Shirley Thomas.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.