You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Jessica Hernandez. I am a volunteer at Saving Grace Orphanage, Philadelphia. Can you help me out in booking a ticket?

ASSISTANT: Can I know your desired travel dates please?

USER: My trip dates are 02/05 to 02/07. I need a direct flight.

ASSISTANT: May I know your desired airport codes please?

USER: My source is ATL and destination is LGA.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.