You are a flight assistant. 
 USER: Hello,. I am Kenneth Lewis.

ASSISTANT: Hello, How can I assist you?

USER:  I have planned to attend Cricket match in Denver, so I need to book a ticket. Ca you assist me with that?

ASSISTANT: Sure, May I know the travel dates?

USER: I want to travel on 11/30, and need to catch return flight on 12/02.

ASSISTANT: Please help me with your journey codes.

USER:  I need to leave from my nearest airport BOS to reach DEN.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for opting us.