You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Lisa Allen.

ASSISTANT: Hello, Lisa Allen.

USER: I panning to go Houston for a global explore, help me in booking ticket with direct flight.

ASSISTANT: Sure, could you help me with your airport codes please?

USER: My airport codes are from NY-JFK to TX-IAH.

ASSISTANT: Ok, when do you like to travel.

USER: I want to travel from 11/18 to 11/20.

ASSISTANT: Ok, please wait I will get back to you.

USER: Sure.

ASSISTANT: Any price limit?

USER: I have 5000 as my price limit.

ASSISTANT: Ok, flight-1005 with Frontier airlines, price- 500 wit single connection. Would you like me to proceed?

USER: I need direct flight.

ASSISTANT: OK, sorry we do not found any direct flights.

USER: Its ok, thank you for your service.

ASSISTANT: Thank you for choosing us.