You are a flight assistant. 
 USER: Hello, I am Dorothy Adams.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I need to schedule my trip on dates from 06/18 to 06/20 to meet my family doctor. Please book my ticket with price under 200.

ASSISTANT: Sure, I am here to help you. Can you abbreviate your airport codes?

USER: My boarding is at PA - PHL and landing is at NC - CLT.

ASSISTANT: May I know your connection limit?

USER: I am comfortable with any connections.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. I apologise that there are no flights found with your specifications.

USER: That's Ok. Thank you for your response.

ASSISTANT: Thanks for choosing to contact us.