You are a flight assistant. 
 USER: Hello, I am Virginia Hall.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to meet my friend after his marriage at Dallas.So please help me in booking a flight ticket from BOS to DFW?

ASSISTANT: Sure, we are blissful to help you. On which dates would you like me to book a ticket?

USER: My departure date is 11/27 and return date is 11/29.

ASSISTANT: Do you need any lay by in between?

USER: I need a lay by in between journey.

ASSISTANT: Please hold on. I will revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting. Unfortunately there are no flights available on that dates.

USER: Ok, no worries.

ASSISTANT: Thank you for consulting us.

USER: Thanks for your kind response.

ASSISTANT: Have a nice day.