You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Can you please reserve a seat from Washington, DCA?

ASSISTANT: Sure, May I know the destination code?

USER: IAD, Washington is the landing point to celebrate my granny's 100th birthday.

ASSISTANT: Please help me with your travel dates.

USER: 12/26 is the start of my journey. 12/28 is the arrival date.

ASSISTANT: May I know your name?

USER: I am Carolyn King.

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

USER: Ok, thanks for sharing the information.

ASSISTANT: Thank you for reaching us.