You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am William Clark.

ASSISTANT: How may I aid you today?

USER: I need to start my journey from Houston, HOU to Minneapolis, MSP to visit Mill city museum.

ASSISTANT: Sure, may I know your travelling days?

USER: So, Can you help me in booking a plane ticket with fare of 200?

ASSISTANT: I am here to help you.

USER: My dates of travel are from 07/10 - 07/12. I need a halt in my travel.

ASSISTANT: Do you have any price limit?

USER: I already mentioned about my fare above.

ASSISTANT: Thank you for your details, there are no flights found by the given information.

USER: Ok, not a problem I will choose other alternative.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for quick service.