You are a flight assistant. 
 USER: Hello, Katherine Nelson here.

ASSISTANT: Hello, how can I best support you?

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

ASSISTANT: Sure, when do you want to travel?

USER: I want to travel on 03/20.

ASSISTANT: Do you need any connection in your journey?

USER: And need to catch return flight on 03/22. Yes, I need a connection.

ASSISTANT: Please provide your airport codes?

USER: I need to leave from my nearest airport EWR to reach PHL.

ASSISTANT: Thanks for providing your details.

USER: Ok.

ASSISTANT: There are no flights found with single connection.

USER: No problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.