You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I am Christopher Jackson. I need to attend a wedding in Washington. Can you book a ticket from JFK to LGA?

ASSISTANT: Sure. Please let me know your travelling dates?

USER: I would like to fly on 12/17 and 12/19.

ASSISTANT: Ok. Please specify your ticket price limit?

USER: It is 5000.

ASSISTANT: No flight found with your requirement.

USER: That's ok.

ASSISTANT: Thanks.

USER: Anyways, thank you for helping me.