You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you from my end?

USER: Robert Walker here. I have to meet my niece in Charlotte, so please book my ticket from BOS to CLT.

ASSISTANT: Sure, I am very happy to help you with your concern. May I know your trip dates please?

USER: My itinerary dates are 10/27 and 10/29.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: I regret to say you that, here I didn't find any flight in your route with your planned dates. Do you have any spare date to travel?

USER: No regrets, thank you for your service.

ASSISTANT: That's fine, hope you your destination on time. Thank you for choosing our ageny.