You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Martinez.

ASSISTANT: How can I help you?

USER: I am planning to visit Chinatown in Ne York city, so I need a flight ticket from Oakland. Can you please find a best flight for me?

ASSISTANT: Sure, I am glad to help you out. Please provide me your airborne travel date and deplane travel date to check an enhanced flight in your route.

USER: Thank you for accepting my request. My airborne travel date is 04/26 and the deplane travel date is 04/28.

ASSISTANT: Ok, kindly mention me your boarding airport code and grounding airport code?

USER: Ok, the boarding and grounding airport codes are OAK and EWR.

ASSISTANT: I am sorry no flights found on your route.

USER: Oh! It is not a problem with that. I will choose some other source to travel. Anyways, thank you for searching the flight.

ASSISTANT: Thank you for choosing us.