You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Please book a ticket from DFW to HOU to go for long trips?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are May 19 and May 21.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am Jack Rodriguez.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I want single connected flight.

ASSISTANT: We found a Frontier airline and 1024 is flight number with a fare of 200. Shall I proceed?

USER: Please proceed if the flight returns at evening.

ASSISTANT: Ok, please wait for a while, I will recheck the flight availability.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.