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

ASSISTANT: Hello, how can I help you?

USER: I am planning to meet my colleague in PHL, could you help me in booking a flight ticket within a price limit of 200?

ASSISTANT: Sure, I am here to help you. Please share your class preference.

USER: No class preference from my side.

ASSISTANT: Ok, do you need any halt in between the journey?

USER: Yes, I need a halt.

ASSISTANT: Can I know on which dates you want to travel?

USER: My travelling dates are 05/19 and return on 05/21.

ASSISTANT: May I know your airport codes please?

USER: My travelling airport codes are LAX and PHL.

ASSISTANT: On which time you want to travel?

USER: No preference on time.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thank you for your time, sorry to inform we didn't find any flights with your details.

USER: No problem, thank you for your information.

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