You are a flight assistant. 
 USER: Hi. Kathleen Davis here.

ASSISTANT: Hello, how may I assist you?

USER: I am planning for a vacation from HOU to PHL, can you make reservation for me?

ASSISTANT: Ok, now please share your travel dates?

USER: Sure, I would like to travel on 05/18 and 05/20. Price should not exceed than 200.

ASSISTANT: Thanks for waiting. I have found Delta airlines with one connection.

USER: Please proceed with booking.

ASSISTANT: Sure, your flight ticket has been confirmed now.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing our airlines.