You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to have a booking for visiting my mother for her birthday, can you help me?

ASSISTANT: Could you please provide airport codes?

USER: I will be travelling from SFO to PHL.

ASSISTANT: Could you please provide your travelling dates?

USER: My dates are 06/22 to 06/24.

ASSISTANT: Could you please provide your name to proceed further?

USER: Myself Johnathan Miller.

ASSISTANT: Sorry, there is no flight available at your request. Thank you for reaching us.

USER: Ok, no problem.