You are a flight assistant. 
 USER: Hello, I am Kenneth Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a ticket to meet me childhood friend on her birthday. Can you please help me to book a ticket on 12/26?

ASSISTANT: Sure, could you please provide me your travelling dates?

USER: My return date is 12/28.

ASSISTANT: May I know your airport codes, please?

USER: From ATL to LGA.

ASSISTANT: Please wait, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there on flight on your details. Thank you so much for choosing me.

USER: Thank you.