You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Can you please help me in booking my ticket from BOS to IAD?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my planned dates of journey are from Jun, 30 to Jul, 02.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, my name is Charles Young.

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

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for opting us.