You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Steven Robinson here. I would like to attend a business trip in New York, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I am here to help you. Could you please provide your travelling dates to search for the flight?

USER: Thank you for taking my request into consideration. I am planning to leave my location on 04/08 and please book my return ticket also on 04/10.

ASSISTANT: Ok, may I know your codes of airport on which route you want to travel?

USER: Sure, I will prefer OAK and LGA as my origin and destination airport codes respectively because those airport codes are near and convenient for me to travel.

ASSISTANT: Please hold on for a moment I will check for available flights.

USER: Ok, take your time but try to bring a best flight in my route.

ASSISTANT: Sorry to say, no flights were available on your route.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.