You are a flight assistant. 
 USER: Hello, myself Ruth Green.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to visit Reading Terminal Market in Philadelphia, PA - PHL. Can you please help me in booking a flight ticket under the fare of 500?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My starting date of travel is on 03/07 and return date is on 03/09.

ASSISTANT: Please share me your source point.

USER: I want to depart from Houston, TX - IAH.

ASSISTANT: We are glad to say that, we found an airline: Hawaiian, flight number: 1005 and price is 100.

USER: Ok, please book my flight ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.