You are a flight assistant. 
 USER: Hello, I am Dennis Roberts.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, may I know your airport codes?

USER: Source is from Los Angeles, LAX. Destination is to Philadelphia, PHL.

ASSISTANT: Do you want any lay by in between your travel?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: Please help me with your travelling dates?

USER: I want to travel on 03/12, and need to catch return flight on 03/14.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry for the inconvenience, there is no flight found with your needs.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for your approach.