You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a flight ticket with the name Jason Williams to San Francisco, CA-SFO to attend client meeting, can you help me with this?

ASSISTANT: Sure, Please help me with your source code.

USER: I need to start from New York, NY-EWR.

ASSISTANT: May I know the trip dates?

USER: I will depart on 01/03 and I will return with in two days that is on 01/05.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem. I'll choose another alternative. Thanks for your information.

ASSISTANT: Thank you for opting us.