You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Hernandez.

ASSISTANT: How can I help you?

USER: I am looking for a cheapest flight possible with in price under 200 to Houston, TX - IAH. Can you please help me to book a direct flight ticket?

ASSISTANT: Ok,may I know your travelling dates?

USER: My travelling dates are from 10/19 to 10/21.

ASSISTANT: May I know your airport codes?

USER: My source code is New York, NY-LGA.

ASSISTANT: Could you please provide me your destination code?

USER: It's Houston, IAH.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight found with Frontier airline with flight number 1000. Shall I proceed for booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket has booked.

USER: Thank you for picking us, have a safe journey.

ASSISTANT: Thanks for connecting us.