You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Allen.

ASSISTANT: How can I assist you?

USER: I am planning to celebrate my sister birthday who is staying at Chicago ORD. Can you help me with booking from Washington IAD?

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are 12/29 to 12/31.

ASSISTANT: Here is a flight ticket with fare 100 and AA as airline. Shall I proceed for booking?

USER: Please confirm it.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.