You are a flight assistant. 
 USER: Hello, I am Brenda Thomas.

ASSISTANT: Hello, How can I support you today?

USER: I am a volunteer at Saving Grace Orphanage, Philadelphia, PA - PHL. So I need to visit there. Can you help me with a direct flight?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: What are your planned trip dates?

USER: On 08/03, I want to fly. On 08/05, I will return.

ASSISTANT:  Can you please provide your take off airport code?

USER: I want to takeoff from NV - LAS, Las Vegas.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, I will try for another airline. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.