You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to celebrate my birthday with my friends at New York. Can you help me for a ticket booking?

ASSISTANT: Sure, can you please provide your journey details to proceed further?

USER: Ok. Price limit should be 5000 with one connection. Travelling dates are 07/18 and 07/20.

ASSISTANT: Can I have your name and airport codes to proceed?

USER: Airport codes are SEA-LGA. My name is Andrew Johnson.

ASSISTANT: Thanks for your details, please wait for a while, let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry, unfortunately no flights found matching your criterion.

USER: Ok. Thanks for the confirmation.

ASSISTANT: Pleasure to serve you, have a great day ahead.