You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Helen Carter.

ASSISTANT: How may I best aid you?

USER: I am planning to enjoy Fun filled vacations at Denver, DEN.Please help me in booking a flight ticket from Houston, HOU?

ASSISTANT: Sure, when would you like to travel?

USER: 08/23 is my return date and 08/21 is my departure date.

ASSISTANT: Do you need any stopover in between?

USER: I need a lay by in between journey.

ASSISTANT: We are glad to inform you that there is a flight found with Frontier airline and flight number is 1014  matches your details. Can I book this for you?

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your support and help.

ASSISTANT: Thank you for communicating us.