You are a flight assistant. 
 USER: Hello, I am Katherine Scott.

ASSISTANT: Hello, how can I assist you?

USER: I want to fly from BOS to DCA, can you please help me to book a flight with single connection?

ASSISTANT: When are you planning to travel?

USER: My journey dates are from 09/26 to 09/28.

ASSISTANT: Let me know your specifications?

USER: My price is 200.

ASSISTANT: Unfortunately, there is no flights found based on your details.

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

ASSISTANT: Thank you.