You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I am Justin Taylor, planning to meet my grand parents on their 60th wedding anniversary at New York, EWR. Can you please book a flight ticket with fare 1000?

ASSISTANT: Sure, May I know the source code?

USER: Washington, IAD is my boarding point.

ASSISTANT: Please help me with your journey dates.

USER: I want to fly on 10/04 and return on 10/06.

ASSISTANT: Please give a minute.

USER: Ok.

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

USER: It's ok, thank you for the information.

ASSISTANT: Thank you.