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

ASSISTANT: Hello. How may I help you?

USER: Could you help me in booking a flight ticket from Boston to Los Angeles within a price limit of 200?

ASSISTANT: May I know your travel dates?

USER: My departure day is 11/05, return day is 11/07.

ASSISTANT: Please help me with your airport codes.

USER: My source and destination airport codes are MA - BOS and CA - LAX.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.