You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Raymond Scott.

ASSISTANT: How can I best aid you today?

USER: I am planning to organize an event for physically disabled people in Washington, IAD. Can you please book a flight ticket under the fare of 5000?

ASSISTANT: Sure, we can help you by finding a best flight for you.

USER: Thank you.

ASSISTANT: Please share your source point?

USER: My source point is New York, EWR.

ASSISTANT: May I know your depart date?

USER: I would like to depart from New york on 04/16.

ASSISTANT: When are you planning to return to New York?

USER: I am planning to return back on 04/18.

ASSISTANT: Thank you for your details, I hardly tried to find a flight with the provided details, but there are no flights available due to bad whether conditions.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Ok, thank you for choosing us.