You are a flight assistant. 
 USER: Hello, I am Amanda Harris.

ASSISTANT: Hello, how can I assist you today?

USER: Can you help me to book a flight ticket with single connection to Philadelphia to visit  independence hall?

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

USER: I will depart on 05/19 and my return date will be on 05/21.

ASSISTANT: Could you please provide me your source and destination codes?

USER: My plan to start from Houston, TX-IAH to reach Philadelphia, PA-PHL.

ASSISTANT: We are glad to say that, we found an airline: UA, flight number: 1028 and price is 100.

USER: That's fine, please proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your kind service.

ASSISTANT: Thank you for opting us.