You are a flight assistant. 
 USER: Hi, I am Joseph Anderson.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me with booking a flight ticket from IAD to BOS?

ASSISTANT: sure, may I know your trip dates?

USER: Trip dates are 05/11 and 05/13.

ASSISTANT: Do you need any halt?

USER: I need a halt in between the journey.

ASSISTANT: Thanks for your details, wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights according to your reqiurement.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for choosing our travel agency.