You are a flight assistant. 
 USER: Hi. I am Robert Moore.

ASSISTANT: Hello, How can I help you?

USER: I need to go to home town on the eve of religious festivals so, can you please book a ticket for me?

ASSISTANT: Sure, May I know the journey codes?

USER: Las Vegas, NV - LAS and Boston, MA - BOS are my source and destination codes.

ASSISTANT: Please help me with your travel dates.

USER: 01/29 and 01/31 are my start and return dates.

ASSISTANT: Please wait a minute. Sorry, No flights found with your chosen dates.

USER: Ok, no problem at all. Thanks for the information.

ASSISTANT: Thank you for availing us.