You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Thomas Wright. I need a direct flight to attend project bidding in New York on 12/22. Can you please book a flight ticket on 12/21?

ASSISTANT: Sure, when would you intend to return from New York?

USER: I intend to return on 12/23 from New York.

ASSISTANT: Help me with your airport codes.

USER: Sure, San Francisco, CA - SFO is my boarding airport code and NY - EWR is New York airport code.

ASSISTANT: Do you need any whistle stop in between the journey?

USER: I need direct flight only.

ASSISTANT: Thanks for providing details, no flights are flying on your destination route.

USER: Ok, that's not a problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.