You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from BOS to HOU?

ASSISTANT: Sure, would you please provide me your itinerary travel dates?

USER: I planned my trip on the dates Sept 21 and Sept 23.

ASSISTANT: Would you like to travel by direct or connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: Are there any more preferences that you want to avail?

USER: I prefer afternoon for my return journey.

ASSISTANT: May I know your name please?

USER: Myself Linda Williams.

ASSISTANT: Linda Williams. I regret to inform that there are no flights on your route with the given dates.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.