You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have a business meeting with my clients in Detroit, can you help me in searching a flight ticket?

ASSISTANT: Ok, please tell me the airport codes for your trip.

USER: I want to start my journey from IAH and DTW.

ASSISTANT: What will be the dates of your trip?

USER: My trip dates are 04/29 and 05/01.

ASSISTANT: Meanwhile, tell me your name?

USER: My name is Lisa Evans. Please make sure that the price limit should not exceed 200.

ASSISTANT: Flight 1004 by JetBlue airlines is available for you with the price of 300.

USER: No, please don't book the ticket.

ASSISTANT: Ok, thank you for reaching our agency.

USER: You are welcome.

ASSISTANT: Have a nice day.