You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I amend you today?

USER: I am Katherine Parker.

ASSISTANT: Ok.

USER: I need to travel to San Francisco, SFO, can you please book a flight ticket with fare 1000?

ASSISTANT: Sure, I am here to help you, may I know your travelling dates?

USER: My travelling dates are 12/04  and 12/06.

ASSISTANT: Could you please help me with your source code?

USER: My boarding point is Philadelphia, PHL.

ASSISTANT: There is a UA 1005 airline with fare of 100 which matches your travelling dates. Shall I proceed with booking?

USER: Please, proceed.

ASSISTANT: Your booking has been confirmed on name of Katherine Parker.

USER: Thank you for helping me.

ASSISTANT: Thank you for picking us.