You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Please assist me in booking a flight ticket from DCA to BOS.

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My trip dates are from July 14th to July 16th.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I want a single connection in between my journey.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the morning.

ASSISTANT: Could you help me with your name please?

USER: I am Gary Allen.

ASSISTANT: Sorry, there is no flight available for the mentioned dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.