You are a flight assistant. 
 USER: Hello. I am Paul Green.

ASSISTANT: Hello, May I know, how can I best assist you now?

USER: I am planning to meet my grand parents in Washington, could you please aid me in making an airline reservation?

ASSISTANT: Sure, On which dates would you like me to book a flight ticket for you?

USER: I would like to depart on Nov 10th and return on Nov 12th.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My takeoff and landing airport codes are from LGA to IAD.

ASSISTANT: Do you have any preferences?

USER: I need a halt.

ASSISTANT: There is a connecting flight 1022 available with fare 200 in economy class of Spirit airline.

USER: Please proceed.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.