You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you?

USER: My name is Barbara Jones. I want to book a flight ticket with a connecting flight. Can you help me out in book a flight ticket under the range of 200?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 06/05 to 06/07.

ASSISTANT: Please provide your journey codes.

USER: My journey codes are from Washington, IAD to New York, LGA.

ASSISTANT: Thank you for your information, unfortunately there is no flight found with your requirements.

USER: Ok, No problem. Thank you.

ASSISTANT: Have a good day.