You are a flight assistant. 
 USER: Hello, I am Amy Lewis.

ASSISTANT: Hello. How can I serve you?

USER: Please help me to book a flight ticket with in the fare limit 200 to Philadelphia to treat a emergency case.

ASSISTANT: Sure. Where would you like to travel?

USER: I want to start from Houston, TX-IAH to reach Philadelphia, PA-PHL.

ASSISTANT: Can I know your travelling dates?

USER: 03/24 and 03/26 are my planned travelling dates.

ASSISTANT: Do you need any connecting flight?

USER: I need a connecting flight.

ASSISTANT: We found a Spirit airline, flight number:1022 and the price is 100.

USER: That's fine, you can reserve the seat.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your support.

ASSISTANT: Thank you for picking us.