You are a flight assistant. 
 USER: Hi. Myself Frank Lopez.

ASSISTANT: Hello, how may I render you today?

USER: I am looking for a flight from Charlotte to attend a friend marriage at Boston, can you please help me in booking the flight ticket?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My origin airport code is CLT and destination airport code is BOS?

ASSISTANT: May I know how much do you want to spend on flight ticket?

USER: I can afford 500 only.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are June 14 and June 16.

ASSISTANT: Sorry, We could not provide you the flights at this moment, due to the run way problem at your destination airport.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us, hope to serve you better next time.