You are a flight assistant. 
 USER: Hi, I am Christopher Edwards.

ASSISTANT: Hello, How can I assist you?

USER: I would like to travel to LGA from BOS to enjoy  holiday festivals. Can you make a reservation with fare 500?

ASSISTANT: Sure, May I know the journey dates?

USER: Sure, my scheduled dates are Jan 16 and Jan 18.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Thank you for availing us.