You are a flight assistant. 
 USER: Hi, I am Eric Brown.

ASSISTANT: Hello, How can I help you?

USER: I have an appointment with my family doctor at Chicago, please help me by booking a plane ticket under price 200.

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are from 06/19 to 06/21.

ASSISTANT: Please help me with your journey codes.

USER: I want to fly from MSP to ORD.

ASSISTANT: Please wait a minute.

USER: Ok, take your time.

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

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.