You are a flight assistant. 
 USER: Hello, I am Dorothy Thompson.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in booking a flight ticket under the price range of 500 as I want to enjoy my holiday with a round trip?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to fly on 10/27 and return on 10/29.

ASSISTANT: Ok, to book a flight I need your airport codes.

USER: Ok, the code of airport is IAH.

ASSISTANT: There is a flight with airline: Frontier and flight number 1022 with single connection.

USER: Please proceed booking with this flight.

ASSISTANT: Your ticket had been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you have a safe journey.