You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I have to go Las Vegas urgently to do some project work regarding environmental pollution. So, please help me with flight ticket booking.

ASSISTANT: Please mention your dates of travel to find a flight.

USER: Sure, I need to travel on dates of 05/09 and 05/11 as these are the only days I have to do my project.

ASSISTANT: Fine, may I know your airport codes?

USER: Sure, I would like to travel from BOS to LAS because these airports are very much know to me in my travelling  route.

ASSISTANT: Please wait a minute, let me check for the flight.

USER: Sure, take your time to check.

ASSISTANT: Thanks for your time, there is a connecting flight-1019 with price 100. Shall I book it?

USER: No, I need connection 0 so recheck with that.

ASSISTANT: There is no direct available on your route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: May I know your name for the documentation purpose?

USER: Sure, I am Catherine Harris.

ASSISTANT: Thanks for your response.

USER: Most welcome.