You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Christine Turner here. I want to travel from DEN to LGA for attending a Marriage. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, help me with the trip dates?

USER: My travelling dates are from 08/20 to 08/22.

ASSISTANT: We do not found any flights running in your desired routes.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.