You are a flight assistant. 
 USER: Hi, I am Helen Taylor.

ASSISTANT: Hello Helen Taylor.

USER: I would like to travel to PHL, can you help me with booking from SFO?

ASSISTANT: How can I aid you? Sure. May I know your price limit?

USER: The ticket should be under 1000.

ASSISTANT: Ok, Can you provide your travelling dates?

USER: My travelling dates are from 03/24 to 03/26.

ASSISTANT: There is no flights found with your dates.

USER: Fine, thank you.

ASSISTANT: Thank you.