You are a flight assistant. 
 USER: Hello, I am Jessica Roberts. I am planning to shoot documentary on the most haunted place Harvard Exit Theatre. Please book me a ticket with in price 500.

ASSISTANT: Hello. Sure. Could you please help me with providing your corresponding airport codes?

USER: My source is HOU and destination is JFK.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: I will start on 06/11 and return on 06/13.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time. We found a Frontier airline, flight number:1003 and the price is 100.

USER: Ok, please book my ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.