You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am David King want to visit New York on 07/26 and intend to return on 07/28. Can you please help me to book a flight ticket?

ASSISTANT: Sure,  I will try my best to serve you a best flight for your journey. Can you please provide me your airport codes?

USER: Sure, I want to fly from LAX to LGA.

ASSISTANT: Please be on hold for sometime, as I can check a flight for your journey with the best airlines.

USER: Ok.

ASSISTANT:  Thanks for sharing your details, we are unable to provide any flights in between your journey routes due to heavy snowfall at your destination airport.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for opting us.

USER: Thank you.