You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to go to Phoenix to participate my father birthday function. Can you help me to book a ticket?

ASSISTANT: Sure, I am here to help you. Can you please help me with your airport codes?

USER: My airport codes are LGA-PHX.

ASSISTANT: Can you please help me with your journey dates?

USER: My trip dates are 10/19 and 10/21.

ASSISTANT: Do you have any specifications?

USER: Price should not cross 5000. I need only direct flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: May I know your good name please?

USER: Janet Adams here.

ASSISTANT: Thanks for waiting. Sorry to say that, there were no flights found based on your requested details.

USER: No problem, I will check with another airline.

ASSISTANT: Thank you for reaching us.

USER: Thank you for kind service.