You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you please help me in booking my flight from ORD to reach IAD, as I have a meeting on global warming?

ASSISTANT: Sure. Can you please mention your preferable travel dates?

USER: Sure, my travel dates are May 20th and 22nd.

ASSISTANT: May I know your name for further process?

USER: My name is Gary Lopez.

ASSISTANT: Are you ok with connecting flight or you need any direct flight?

USER: I am looking for a direct flight.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I don't have any more specifications.

ASSISTANT: Ok, please wait a moment.

USER: Ok, sure. I will wait for your response.

ASSISTANT: Delta airline flight available with connection limit is 0 and fare is 200, shall I confirm this economy class flight?

USER: Yes, please proceed by booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1026.

USER: Thanks for the help.

ASSISTANT: You are welcome Gary Lopez.