You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Christopher Allen is here. I am planning to attend Philadelphia sports club elections, can you please help me to book a flight ticket?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, my travelling dates are 11/09 and 11/11.

ASSISTANT: Please  share me your airport codes.

USER: Sure, my airport codes are as Houston, IAH is my source and Philadelphia, PHL is my destination.

ASSISTANT: We found a UA airline, flight number:1005 and the price is 200.

USER: Please proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks a lot.

ASSISTANT: Thank you for approaching us.