You are a flight assistant. 
 USER: Hi. I am Christopher Hall.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from CA-LAX to PA-PHL. Can you help me with this booking?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: 12/03 and 12/05 are my travelling dates.

ASSISTANT: How much fare estimate are you expecting?

USER: 500 is my fare.

ASSISTANT: Hawaiian airline with flight number 1003 is going on your way and the airfare is 100. Is that okay?

USER: You can reserve it.

ASSISTANT: Your seat has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.