You are a flight assistant. 
 USER: Hello, I am Deborah Clark.

ASSISTANT: Hello. How  can I help you Clark?

USER: I am planning to visit my friend's house in New York, can you please help me to book a flight ticket with 200?

ASSISTANT: Sure, may I know your airport abbreviations?

USER: My journey points are from DTW to LGA.

ASSISTANT: May I know your journey dates?

USER: I am travelling from 07/12 to 07/14.

ASSISTANT: May I know your price limit? Sorry to tell that there are no flights found on your requested dates?

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your service.